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## Perímetro e área : uma proposta didática para o ensino fundamental

Centenaro, Grasciele
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
27.18%

## Efeitos da Seleção para Peso Pós-desmame sobre Medidas Corporais e Perímetro Escrotal de Machos Nelore de Sertãozinho (SP)

Cyrillo, Joslaine Noely Dos Santos Goncalves; Razook, Alexander George; De Figueiredo, Leopoldo Andrade; Neto, Luiz Martins Bonilha; Ruggieri, Ana Cláudia; Tonhati, Humberto
Tipo: Artigo de Revista Científica Formato: 403-412
POR
Relevância na Pesquisa
26.97%
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); The objective of this study was to evaluate the indirect effects of selection for post-weaning weight on body measures and scrotal perimeter of 809 Nellore males from selected herds (NeS and NeT) and control herd (NeC), of the Estação Experimental de Zootecnia de Sertãozinho. The statistical analyses were performed by using a sire mixed model where the random source of variation, sires, was nested within herds. The fixed effects were herds, year of performance test (PGP), age of cow and age of the animal as a covariate. The average genetic change for final weight, corrected for 378 days of age (W378), calculated as a deviation from the NeC herd, were 40.2 and 44.3 kg for the NeS and NeT herds, respectively. The correlated changes, for the other traits were, in the same order, 4.5 and 4.5 cm for hip height (HH); 6.2 and 7.0 cm for chest girth (CG); 5.8 and 6.3cm for body length (BL); 2.9 and 2.0 cm for dorsal line length (DL); 1.7 and 2.4 cm for rump length (RL); 1.0 and 1.3 cm for distance between pin bones (DPB); 1.8 and 2.6 cm for distance between hip bones (DHP); and 1.3 and 2.2 cm for scrotal perimeter (SP). The results of this study showed that the direct selection for postweaning weight promoted correlated positive responses in the body dimensions and also in the scrotal perimeter of Nellore males.

## Spatial characterization of wildfire orientation patterns in California

Barros, Ana M.G.; Pereira, J.M.C.; Moritz, Max A.; Stephens, Scott L.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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Using 100 years of fire perimeter maps, we investigate the existence of geographical patterns in fire orientation across California. We computed fire perimeter orientation, at the watershed level, using principal component analysis. Circular statistics were used to test for the existence of preferential fire perimeter orientations. Where perimeters displayed preferential orientation, we searched for evidence of orographic channeling by comparing mean fire orientation with watershed orientation. Results show that in California, 49% of the burnt area is associated with watersheds, where fires displayed preferential orientation. From these, 25% of the burnt area is aligned along the NE/SW orientation and 18% in the E/W orientation. In 27 out of 86 watersheds with preferential fire alignment, there is also correspondence between mean fire orientation and watershed orientation. Topographic influence on fire spread and dominant wind patterns during the fire season can account for the consistency in fire perimeter orientation in these regions. Our findings highlight the historical pattern of fire perimeter orientation and identify watersheds with potential orographic channeling

## Comparison of the original Amsler grid with the preferential hyperacuity perimeter for detecting choroidal neovascularization in age-related macular degeneration

Isaac,David Leonardo Cruvinel; Ávila,Marcos Pereira de; Cialdini,Arnaldo Pacheco
Fonte: Conselho Brasileiro de Oftalmologia Publicador: Conselho Brasileiro de Oftalmologia
Tipo: Artigo de Revista Científica Formato: text/html
Relevância na Pesquisa
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PURPOSE: To compare the preferential hyperacuity perimeter (Preview PHP; Carl Zeiss Meditec, Dublin, CA) with the original Amsler grid in the detection of choroidal neovascularization (CNV) in patients with age-related macular degeneration (AMD). METHODS: Patients were classified into groups, based on the severity of the age-related macular degeneration and underwent preferential hyperacuity perimeter and Amsler grid testing. High sensitivity and or high specificity of a method were defined as the observation of at least 80% of each one the parameters. RESULTS: Sixty-five patients (65 eyes) were analyzed statistically. The sensitivity of detection of choroidal neovascularization was 70% by the Amsler grid and 90% by the preferential hyperacuity perimeter and the specificity of the Amsler grid was 85.5% and that of the preferential hyperacuity perimeter 81.8%. CONCLUSIONS: The preferential hyperacuity perimeter has greater sensitivity than the Amsler grid in the detection of choroidal neovascularization among patients over 50 years of age and is a promising method for monitoring patients with age-related macular degeneration. Although the original Amsler grid is less sensitive, it is a portable method, not expensive, accessible and presents reasonable sensitivity and high specificity in the diagnosis of choroidal neovascularization. Its use can be recommended for self-monitoring in patients with age-related macular degeneration as an alternative to preferential hyperacuity perimeter and when this method is not available.

## Correlation between transverse expansion and increase in the upper arch perimeter after rapid maxillary expansion

Claro,Cristiane Aparecida de Assis; Abrão,Jorge; Reis,Silvia Augusta Braga; Fantini,Solange Mongelli de
Tipo: Artigo de Revista Científica Formato: text/html
Relevância na Pesquisa
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The purpose of the present study was to assess the correlation between transverse expansion and the increase in upper arch perimeter, after maxillary expansion. Dental casts of eighteen patients were obtained before treatment and again five months after maxillary expansion. Measurements of intermolar width, intercanine width, arch length and arch perimeter were made with a digital caliper on photocopies taken from the dental casts. After assessment of the method error, a multiple regression model was developed following the identification of the best subset of variables. The resulting equation led to the conclusion that the increase in arch perimeter is approximately given by the addition of 0.54 times the intercanine expansion, and 0.87 times the arch length alteration.

## Analysis of High-Perimeter Planar Electrodes for Efficient Neural Stimulation

Wei, Xuefeng F.; Grill, Warren M.
Fonte: Frontiers Research Foundation Publicador: Frontiers Research Foundation
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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Planar electrodes are used in epidural spinal cord stimulation and epidural cortical stimulation. Electrode geometry is one approach to increase the efficiency of neural stimulation and reduce the power required to produce the level of activation required for clinical efficacy. Our hypothesis was that electrode geometries that increased the variation of current density on the electrode surface would increase stimulation efficiency. High-perimeter planar disk electrodes were designed with sinuous (serpentine) variation in the perimeter. Prototypes were fabricated that had equal surface areas but perimeters equal to two, three or four times the perimeter of a circular disk electrode. The interface impedance of high-perimeter prototype electrodes measured in vitro did not differ significantly from that of the circular electrode over a wide range of frequencies. Finite element models indicated that the variation of current density was significantly higher on the surface of the high-perimeter electrodes. We quantified activation of 100 model axons randomly positioned around the electrodes. Input–output curves of the percentage of axons activated as a function of stimulation intensity indicated that the stimulation efficiency was dependent on the distance of the axons from the electrode. The high-perimeter planar electrodes were more efficient at activating axons a certain distance away from the electrode surface. These results demonstrate the feasibility of increasing stimulation efficiency through the design of novel electrode geometries.

## Clock Drawing in Spatial Neglect: A Comprehensive Analysis of Clock Perimeter, Placement, and Accuracy

Chen, Peii; Goedert, Kelly M.
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
27.06%
Clock drawings produced by right-brain-damaged (RBD) individuals with spatial neglect often contain an abundance of empty space on the left while numbers and hands are placed on the right. However, the clock perimeter is rarely compromised in neglect patients’ drawings. By analyzing clock drawings produced by 71 RBD and 40 healthy adults, this study investigated whether the geometric characteristics of the clock perimeter reveal novel insights to understanding spatial neglect. Neglect participants drew smaller clocks than either healthy or non-neglect RBD participants. While healthy participants’ clock perimeter was close to circular, RBD participants drew radially extended ellipses. The mechanisms for these phenomena were investigated by examining the relation between clock-drawing characteristics and performance on six subtests of the Behavioral Inattention Test (BIT). The findings indicated that the clock shape was independent of any BIT subtest or the drawing placement on the test sheet and that the clock size was significantly predicted by one BIT subtest: the poorer the figure and shape copying, the smaller the clock perimeter. Further analyses revealed that in all participants, clocks decreased in size as they were placed farther from the center of the paper. However...

## The Indented Perimeter as the Growth Front of the Lamellar Single Micro-Crystal of Colloidal Gold

UYEDA, Natsu
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica Formato: text/html
EN
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The single micro-crystal of gold grows on its (111) habit surface as a lamella of about 100 Å thick when prepared under the acidic condition, sometimes being accompanied even by the spiral growth steps. The aspect of the growing crystal was observed by the electron microscope at several intermediate stages. The most characteristic feature is the anomalously indented or densely fringed perimeter, which finally disappears leaving the sharp straight lines when the growth comes to an end. It seems very reasonable to consider that the small particles of colloidal gold of ordinary size or much less are adsorbed on the side surface of the perimeter and arrange themselves so as to be well fitted to the lattice of the main crystal. The indentation of the perimeter also appears when the crystal undergoes the spiral growth.

## Age-corrected normal differential luminance values for the entire 80° visual field applying three threshold estimating strategies, using the Octopus 900 perimeter; Alterkorrigierte Normwerte für das gesamte 80° Gesichtsfeld mit drei verschiedenen Strategien und dem Octopus 900 Perimeter gemessen

Pricking, Sandra
Tipo: Dissertação
EN
Relevância na Pesquisa
37.13%
Purpose: 1. To create a model describing age-corrected normal values for the entire 80° visual field (VF) measured with the Octopus 900 (O900) perimeter, 2. to compare three threshold estimating strategies: conventional (4-2-1), dynamic and German Adaptive Threshold Estimation (GATE-i) and 3. to compare local differential luminal sensitivity (DLS) values obtained with the GATE-i strategy on both, the O900 and the Octopus 101 (O101) perimeters. Methods: 81 ophthalmologically healthy subjects between 10 and 79 years of age were examined with the O900 perimeter within 80° eccentricity (86 stimulus locations) using the three different strategies in a randomised order. 16 stimulus locations were measured twice during one examination in both conventional and dynamic strategies to assess the short-term fluctuation (SF). To measure the long-term fluctuation (LF), 14 subjects were examined on two further appointments. 24 subjects were examined with the GATE-i strategy on both the O900 and the O101 perimeters. Results: With the dynamic strategy local DLS values were 0.21 dB (mean) higher, with the GATE-i strategy 0.98 dB (mean) higher than with the conventional strategy. A smooth mathematical model for each strategy was achieved. Model fit was nearly identical for the conventional (R2 = 0.75)...

## Oberflächenspannung in der Methode der Finiten Massen; Surface tension in the finite mass method

Langmann, Christian
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
26.97%
Die Methode der Finiten Massen ist eine Lagrangesche Teilchenmethode zur numerischen Simulation kompressibler Fluide. Im Kontext dieser Methode werden Effekte modelliert, welche an freien Rändern von Fluidvolumina (Flüssigkeiten) unter dem Einfluß von Oberflächenspannung auftreten. Dabei werden nur solche Effekte untersucht, die von charakteristischen geometrischen Größen der betrachteten Oberfläche abhängen. Die Oberfläche eines Fluidvolumens wird als Niveaufläche der Massendichte definiert, so daß im weiteren aus den Level-Set Methoden bekannte Techniken zum Einsatz kommen können. Diese erlauben es, mit Hilfe der Perimeter-Formel ein Energiefunktional für die Oberflächenenergie zu definieren, welches dann im Rahmen der Methode der Finiten Massen behandelt werden kann. Neben analytischen Betrachtungen der Eigenschaften der Modellierung wird insbesondere auch auf die für numerisch stabile Rechnungen benötigte signierte Distanzfunktion zu einer gegebenen Niveaufläche eingegangen. Diese wird als Viskositätslösung der Eikonalgleichung berechnet, wobei zur Lösung auf einem regelmäßigen Gitter auf die Fast Marching Method zurückgegriffen wird. Zur Illustration der grundsätzlichen Eigenschaften der Modellierung schließen sich kurze Beispielrechnungen an.; The Finite Mass Method is a Lagrangian particle method for numerical simulation of compressible flows. Within the context of this method effects appearing on free boundaries of fluids (liquids) arising from surface tension are modeled. Only such effects depending on characteristic geometric quantities of the considered surface are examined. The surface of a fluid is defined as a level set of the mass density. This admits using well known techniques from the area of level set methods. Thus taking the perimeter formula from geometric measure theory it is possible to define an energy functional for the energy of the surface...

## Heat Semigroups and Diffusion of Characteristic Functions; Wärmeleitungshalbgruppen and Diffusion charakteristischer Funktionen

Preunkert, Marc
Tipo: Dissertação
EN
Relevância na Pesquisa
27.06%

## Avaliação da mobilidade torácica em crianças saudáveis do sexo masculino pela medição do perímetro torácico; Assessment of healthy male children chest mobility by measuring the thoracic perimeter

Simon, Karen Muriel; Carpes, Marta Fioravante; Imhof, Beatriz Vidotto; Juk, Daniel Benedet; Souza, Gisele Cristina; Beckert, Giselle Fernanda Quintino; Cruz, Lilian Cristina; Bernardes, Mariane; Brocca, Rodrigo Vielmo
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Relevância na Pesquisa
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## Resolução de problemas envolvendo áreas e perímetros; um estudo no 5º ano de escolaridade

Nunes, Lauriana Maria Pires
Fonte: Repositório Comum de Portugal Publicador: Repositório Comum de Portugal