Search Results - "algorithm"

Genetic diversity and population structure in Ethiopian Urochloa brizantha genotypes uncovered using inter simple sequence repeat (ISSR) markers by Meheret, F., Tesfaye, K., Haileselassie, T., Muktar, Meki

“…The 66 genotypes of <i>U. brizantha</i> were grouped into seven clusters (K = 7) based on STRUCTURE analysis and the unweighted pair group method with arithmetic mean (UPGMA) algorithm after the formation of three major clusters at the root. …”
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The brokerage institutions and smallholder market linkages in marketing of horticultural crops in Fogera woreda, south Gondar, Amhara National Regional State by Tamir, S.E.

“…Kernel Matching with band width of 0.25 was found to be the best matching algorithm. The result of the study also revealed that, smallholder farmers using brokerage institutions have got 4393.62 ETB higher net income and 13.55% of greater marketed surplus than those smallholders who do not use. …”
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How effective are DNA barcodes in the identification of African rainforest trees? by Parmentier, I., Duminil, J., Kuzmina, M., Philippe, M., Thomas, D.W., Duncan, T., Kenfack, D., Chuyong, G.B., Hardy, Olivier J.

“…Finally, we highlight some limitations of the BLAST algorithm as currently implemented and suggest possible improvements for barcoding applications.…”
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Estimating the spatial variability of water consumption in the Karkheh River Basin, Iran - using MODIS data by Muthuwatta, Lal P., Ahmad, Mobin-ud-Din, Rientjes, T.H.M., Bos, M.G.

“…Satellite data along with the SEBS algorithm and geo-statistical techniques are effective to estimate spatial patterns of water consumption and availability. …”
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Very high resolution interpolated climate surfaces for global land areas by Hijmans, Robert J., Cameron, Susan E., Parra, Juan L., Jones, Peter G., Jarvis, Andy

“…We used the thin-plate smoothing spline algorithm implemented in the ANUSPLIN package for interpolation, using latitude, longitude, and elevation as independent variables. …”
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DNA species surveillance: Monitoring bushmeat poaching and trading in Kenya using partial cytochrome b gene by Kimwele, C.N., Karisa B.K., Stokes M., Jung'a, J.O., Hanotte, Olivier H., Skilton, Robert A., McElroy D.

“…These were compared, using Basic Local Alignment Search Tool (BLAST) algorithm, with NCBI GenBank reference sequences for species identity. …”
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Genetic tests for estimating dairy breed proportion and parentage assignment in East African crossbred cattle by Strucken, E.M., Al-Mamun, H.A., Esquivelzeta-Rabell, C., Gondro, C., Okeyo Mwai, Ally, Gibson, John P.

“…Methods:We constructed subsets of 100 to 1500 SNPs from the 735k-SNP Illumina panel by selecting: (a) on high minor allele frequencies (MAF) in a crossbred population; (b) on large differences in allele frequency between ancestral breeds; (c) at random; or (d) with a differential evolution algorithm. These panels were tested on a dataset of 1933 crossbred dairy cattle from Kenya/Uganda and on crossbred populations from Ethiopia (N = 545) and Tanzania (N = 462). …”
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Model-based estimation of above-ground biomass in the miombo ecoregion of Zambia by Halperin, J., LeMay, V., Chidumayo, E.N., Verchot, Louis V., Marshall, P.

“…We assessed different combinations of these datasets using three models, a semiparametric generalized additive model (GAM) and two nonlinear models (sigmoidal and exponential), employing a genetic algorithm for variable selection that minimized root mean square prediction error (RMSPE), calculated through cross-validation. …”
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Inter-primer binding site (iPBS) retrotransposon markers provide insights into the genetic diversity and population structure of carrots (Daucus, Apiaceae) by Yildiz, Mehtap, Arbizu Berrocal, Carlos Irvin

“…The dendrogram based on the UPGMA clustering algorithm and a principal coordinate analysis (PCoA) indicated the presence of four clusters. …”
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Assessment of the genetic diversity and population structure of the peruvian andean legume, tarwi (Lupinus mutabilis), with high quality SNPs by Huaringa Joaquin, Amelia Wite, Saldaña Serrano, Carla Lizet, Saravia Navarro, David, García Bendezú, Sady, Rodriguez Grados, Pedro Manuel, Salazar Coronel, Wilian, Camarena Mayta, Felix, Injante Silva, Pedro Hugo, Arbizu Berrocal, Carlos Irvin

“…A dendrogram was generated using the UPGMA clustering algorithm and, like the principal coordinate analysis (PCoA), it showed two groups that correspond to the geographic origin of the tarwi samples. …”
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An analysis of the rice-cultivation dynamics in the lower Utcubamba river basin using SAR and optical imagery in Google Earth Engine (GEE) by Medina Medina, Angel James, Salas López, Rolando, Zabaleta Santisteban, Jhon Antony, Tuesta Trauco, Katerin Meliza, Turpo Cayo, Efrain Yury, Huaman Haro, Nixon, Oliva Cruz, Manuel, Gómez Fernández, Darwin

“…A total of 168 SAR images and 96 optical images were obtained, corrected, and classified using machine learning algorithms, achieving a monthly average accuracy of 96.4% and 0.951 with respect to the overall accuracy (OA) and Kappa Index (KI), respectively, in the year 2019. …”
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Change of vegetation cover and land use of the Pómac forest historical sanctuary in northern Peru by Vera Díaz, Elvis, Camila Leandra, Cruz Grimaldo, Barboza Castillo, Elgar, Salazar Coronel, Wilian, Canta Ventura, Jorge Marino, Salazar Hinostroza, Evelin Judith, Vásquez Pérez, Héctor Vladimir, Arbizu Berrocal, Carlos Irvin

“…The employed approach was the random forest algorithm and visually interpreted Landsat satellite images for the periods 2000–2002, 2002–2004, and 2004–2008. …”
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Assessment of the genetic structure and diversity of arracacha (Arracacia xanthorrhiza) using genotyping-by-sequencing by Arbizu Berrocal, Carlos Irvin, Saldaña Serrano, Carla Lizet, Lazo, E., Suca Damiano, Esther Stefany, Santa Cruz Padilla, Angel Esteban, Chávez Cabrera, Alexander, Cabrera Hoyos, Héctor Antonio, Guerrero Abad, Juan Carlos, Maicelo Quintana, Jorge Luis

“…A dendrogram was generated using the UPGMA clustering algorithm, and, similar to the principal coordinate analysis (PCoA), it showed four groups. …”
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Potential, attainable, and current levels of global crop diversity by Aramburu Merlos, Fernando, Hijmans, Robert J.

“…We then used a crop allocation algorithm to distribute the required crop area to suitable cropland. …”
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IRimage: open source software for processing images from infrared thermal cameras by Pereyra Irujo, Gustavo Adrian

“…IRimage processes thermal images, extracting raw data and calculating temperature values with an open and fully documented algorithm, making this data available for further processing using image analysis software. …”
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Machine vision for precise control of weeds by Blasco, José, Benlloch, J. V., Agustí, Manuel, Moltó, Enrique

“…The first system is based on a Bayesian algorithm for segmenting the images, which requires to be previously trained by an expert, who selects areas of different images, trying to represent the colour variability of the plants, the soil and the weeds. …”
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Fusion of Different Image Sources for Improved Monitoring of Agricultural Plots by Moltó, Enrique

“…The robustness of the proposed algorithm has been validated by using image similarity metrics.…”
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Risk-based regionalization approach for area-wide management of HLB vectors in the Mediterranean Basin by Galvan, Anaïs, Beozzo Bassanezi, Renato, Luo, Weiqi, Vanaclocha, Pilar, Vicent, Antonio, Lázaro, Elena

“…The size and location of these PMAs were estimated by means of a hierarchical clustering algorithm with spatial constraints whose performance was assessed under different configuration scenarios. …”
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Size detection limits of spICP-MS for analysis of nanoparticles in environmental media by Goossens, Eline

“…Dwell times of 50 s were used, but it was found that these needed to be merged to bigger dwell times to get correct results in the outlier detection algorithm. Further research to detect NPs in the presence of high dissolved back-grounds is required, as well as research for DLs and LODs of other types of nanoparticles, such as NPs with different isotopes and / or spectral in-terferences. …”

Space-time detection of deforestation, forest degradation and regeneration in montane forests of Eastern Tanzania by Hamunyela, Eliakim, Brandt, Patric, Shirima, Deo, Do, Ha Thi Thanh, Herold, Martin, Román Cuesta, Rosa María

“…Here, we use the STEF (Space-Time Extremes and Features) algorithm and Landsat time series to track forest disturbances (deforestation and degradation) and forest gains (regeneration) as spatio-temporal events over seventeen years (2001–2017) in the montane forests of the Mvomero District in Tanzania. …”
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