Estimate of the region of attraction for the unperturbed motion of a railroad car on a circular section of track

1983 ◽  
Vol 19 (4) ◽  
pp. 377-381
Author(s):  
V. G. Verbitskii
Keyword(s):  
Region Of Attraction ◽  
Unperturbed Motion ◽  
Circular Section

scholarly journals Some Observations on Glacier Flow

1951 ◽  
Vol 1 (9) ◽  
pp. 496-500 ◽  
Author(s):  
R. Haefeli
Keyword(s):  
Longitudinal Profile ◽  
Circular Section ◽  
Glacier Flow

AbstractThe excavation of a tunnel by I’Energie Ouest Suisse (EOS) presented inter alia the opportunity to construct a longitudinal profile of the glacier speed and also to observe the speed of the transverse contraction of a circular section. The swift change of shape without fracture was noteworthy. A second tunnel driven from the glacier snout straight up the subglacial stream gave the opportunity to establish a definite connection between the form of the glacier sole and its surface. Finally, measurements of the glacier speeds on the surface and their variations from year to year gave a closer indication of the nature of Forbes’s bands.

scholarly journals Morphological and phytochemical analysis of leaves and stems of Tetrapterys multiglandulosa CAV.

2020 ◽  
pp. 959-964
Author(s):  
Gilberto Gonçalves Facco ◽  
Eloty Justina Schleder ◽  
Natalia Yoshioka de Vidis ◽  
Maristela Halverson ◽  
Rosemary Matias ◽  
...  
Keyword(s):  
Cross Sections ◽  
Clinical Signs ◽  
Single Layer ◽  
Anatomical Study ◽  
Phytochemical Analysis ◽  
Native Plant ◽  
Circular Section ◽  
Vegetative Organs ◽  
Ethanol Extracts ◽  
Columnar Cells

This study aimed to carry out morphoanatomical, histochemical and phytochemical analysis of leaves and stems of Tetrapterys multiglandulosa Cav. (Malpighiaceae), a native plant responsible for abortion and sudden death in beef cattle. Plant specimens underwent anatomical study, in which leaves and stems were dried and ground with aqueous and ethanol extracts subjected to histochemical and phytochemical analysis. Anatomical observation of vegetative organs detected the presence of simple columnar cells in the adaxial epidermis, palisade mesophyll, parenchyma with a layer of cells and paracitic type stomata. Stem cross-sections presented circular section, single layer (uniseriate) epidermis with thick cuticle and Malpighi’s trichomes, the phelogen was in differentiation. The cortex showed angular collenchyma, parenchyma with exogenous channels and druse shaped calcium oxalate crystals. Phytochemical tests of aqueous and ethanol extracts of leaves and stems indicated the presence of phenolic compounds, tannins, flavonoids, saponins, alkaloids and cardiotonic heterosides. Potentially phytotoxic secondary metabolites evidenced in the leaves and stems, including saponins and cardiotonic heterosides were correlated with clinical signs observed in intoxicated animals.

Estimating the region of attraction for large-scale systems with uncertainties

Automatica ◽  
2010 ◽  
Vol 46 (2) ◽  
pp. 445-451 ◽  
Author(s):  
Aleksandar I. Zečević ◽  
Dragoslav D. Šiljak
Keyword(s):  
Large Scale ◽  
Region Of Attraction ◽  
Large Scale Systems

Note on the Locomotion of the Redia of Fasciola hepatica

Parasitology ◽  
1928 ◽  
Vol 20 (1) ◽  
pp. 113-114 ◽  
Author(s):  
W. Rees Wright
Keyword(s):  
Fasciola Hepatica ◽  
Circular Section

Whilst studying the development of Fasciola hepatica, I observed that the “collar” of the redia was rarely so prominent as it was figured and described by Thomas (1883). This observation, and a consideration of the mechanical requirements of the case, led me to suggest (1927) that Thomas was incorrect when he attributed to this structure the function of maintaining the circular section of the redia.

scholarly journals Effects of different types of shelter on physiology and growth of Sangiovese vines during the first year after planting

2019 ◽  
Vol 13 ◽  
pp. 04020
Author(s):  
Giovan Battista Mattii ◽  
Eleonora Cataldo ◽  
Linda Salvi ◽  
Sofia Sbraci ◽  
Francesca Paoli ◽  
...  
Keyword(s):  
Water Potential ◽  
First Year ◽  
Gas Exchanges ◽  
Circular Section ◽  
Stages Of Growth ◽  
Early Stages ◽  
Single Leaf ◽  
Leaf Gas Exchanges ◽  
Different Types ◽  
Sprout Growth

In the early stages of planting, the shelter can provide for young vines protection against damage of various kinds. Despite their widespread use, few surveys have been devoted to the study of innovative shelter types and the possible influence of these protections on the physiology and development of plants. In the present experiment, which took place in 2017 in a Tuscan winery, the effects of vine protections by the company OSO (Prato) on single leaf gas exchanges and on the shoot growth in the first year of planting were studied. Three types of shelters with a circular section (completely perforated, partially perforated and closed) have been compared with the traditional full-wall shelters with square section. During the growing season, sprout growth measures, leaf area, leaf gas exchanges and water potential were carried out on the young vines. At the end of the season, shoots were sampled to measure the dry matter accumulated during the season. Among the shelters taken into consideration, it emerges that the completely perforated type guarantees the best development, with differences that are almost always significant for most of the measured parameters with traditional shelters. On the contrary, the closed typology has led to a reduction in growth, in gas exchanges and in water potential. In conclusion, the type completely perforated could constitute a valid alternative to the traditional one because, besides being a useful means for the protection of the vine, it could benefit the development of the root system in the early stages of growth.

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