1,721,170 research outputs found
Myrcia excelsa (Myrtaceae), a new species from Espírito Santo, Brazil
No full textGaem, Paulo Henrique, Fernandes, Thiago, Valdemarin, Karinne Sampaio, Lucas, Eve, Mazine, Fiorella Fernanda (2021): Myrcia excelsa (Myrtaceae), a new species from Espírito Santo, Brazil. Phytotaxa 501 (2): 293-296, DOI: 10.11646/phytotaxa.501.2.4, URL: http://dx.doi.org/10.11646/phytotaxa.501.2.
A new species of Abuta (Menispermaceae) from the Brazilian Atlantic Forest
No full textFeliz, Pablo Fernando, Fernandes, Thiago, Joffily, Ana, Bovini, Massimo Giuseppe, Braga, João Marcelo Alvarenga (2022): A new species of Abuta (Menispermaceae) from the Brazilian Atlantic Forest. Phytotaxa 556 (2): 193-200, DOI: 10.11646/phytotaxa.556.2.9, URL: http://dx.doi.org/10.11646/phytotaxa.556.2.
FIGURE 5 in A new species of Abuta (Menispermaceae) from the Brazilian Atlantic Forest
No full textFIGURE 5. Map of occurrence records of Abuta alto-macahensis. Black contours represent the limits between the Brazilian States.Published as part of Feliz, Pablo Fernando, Fernandes, Thiago, Joffily, Ana, Bovini, Massimo Giuseppe & Braga, João Marcelo Alvarenga, 2022, A new species of Abuta (Menispermaceae) from the Brazilian Atlantic Forest, pp. 193-200 in Phytotaxa 556 (2) on page 198, DOI: 10.11646/phytotaxa.556.2.9, http://zenodo.org/record/696604
FIGURE 1 in Three new species of Eugenia (Myrtaceae) from the Atlantic Forest of southeastern Brazil
No full textFIGURE 1. Holotype of Eugenia cabofriana (image provided by and reproduced with the consent of the RB herbarium).Published as part of Fernandes, Thiago, Giaretta, Augusto, Sobral, Marcos, Souza, Marcelo Da Costa & Braga, João Marcelo Alvarenga, 2022, Three new species of Eugenia (Myrtaceae) from the Atlantic Forest of southeastern Brazil, pp. 51-62 in Phytotaxa 552 (1) on page 53, DOI: 10.11646/phytotaxa.552.1.4, http://zenodo.org/record/667319
Drawing up an industrial CT system purchase specification: a Brazilian case study
No full textComputed tomography integration to the quality control loop of Brazilian industries has been continuously growing. Being capable of imaging internal structures of an object, hidden features formerly evaluated only after physically sectioning it became visible through computed tomography. Despite being an engineering technology to be considered in non-destructive
analysis and dimensional metrology, the task of selecting an appropriate CT measurement system is not trivial. This paper outlines a general methodology for defining the quotation bases of an industrial CT system suitable for in-line quality control of light metal parts, and thus assisting the buyoff activity
Experimental evaluation of the uncertainty associated with the result of feature-of-size measurements through computed tomography
No full textComputed tomography for dimensional metrology has been introduced in quality control loop for about a decade. Due to the complex measurement-error cause system, generally no consistent measurement uncertainty reporting has been made. The ISO 15530-3 experimental approach, which makes use of calibrated parts, has been tested for estimating the uncertainty of CT-based measurements of features of size of a test object made of POM. Particular attention is given to the design of experiment and to the measurement uncertainty components. The most significant experimental findings are outlined and discussed in this paper
Exploratory analysis of voxel size effects on CT measurements of situation characteristics of type point-to-point distance
No full textIn recent years, computed tomography (CT) has been applied as an industrial metrology tool for the dimensional evaluation of visible and even hidden features of production parts in a non-destructive manner. Considering the experimental findings of a recent work of the authors, this paper deals with the effect of voxel size on measuring distances between feature-of-size centers, which would be less sensitive to edge offset errors. Particular attention is given to the design of experiment and to the measurement uncertainty sources. The most significant experimental findings are outlined and discussed in this paper
Experimental assessment of computed tomography dimensional performance using modular test pieces made of polyoxymethylene and aluminum
No full textComputed tomography for dimensional metrology has been part of the quality control loop for more than a decade. Because of the complex measurement-error cause system and the lack of appropriate guidance, usually no consistent uncertainty reporting has been made. Modular test pieces made of polyoxymethylene and aluminum have been devised, manufactured and used to investigate some influence factors intrinsic to CT-based data and their effects on evaluating features of size. The experimental planning and the most significant experimental findings, including the use of artefact reduction algorithms, are presented and discussed in this paper
FIGURE 1 in New combination and typifications of names of Caribbean species of Myrcia sect. Calyptranthes (Myrtaceae)
No full textFIGURE 1. Lectotype of Calyptranthes rigida Swartz (Swartz s.n. S [herb. nº. S S-R-901]).Published as part of Braga, João Marcelo Alvarenga, Fernandes, Thiago, Campbell, E., Prado, Jefferson & Lucas, Eve J., 2022, New combination and typifications of names of Caribbean species of Myrcia sect. Calyptranthes (Myrtaceae), pp. 189-194 in Phytotaxa 567 (2) on page 190, DOI: 10.11646/phytotaxa.567.2.7, http://zenodo.org/record/714179
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