scholarly journals On the Efficacy of Handcrafted and Deep Features for Seed Image Classification

2021 ◽  
Vol 7 (9) ◽  
pp. 171
Author(s):  
Andrea Loddo ◽  
Cecilia Di Ruberto
Keyword(s):  
Lower Amount ◽  
Data Sets ◽  
Plant Seeds ◽  
History Of Agriculture ◽  
Classification Framework ◽  
Ensemble Strategy ◽  
History Of ◽  
Plant Sciences ◽  
Ancient Times ◽  
F Measure

Computer vision techniques have become important in agriculture and plant sciences due to their wide variety of applications. In particular, the analysis of seeds can provide meaningful information on their evolution, the history of agriculture, the domestication of plants, and knowledge of diets in ancient times. This work aims to propose an exhaustive comparison of several different types of features in the context of multiclass seed classification, leveraging two public plant seeds data sets to classify their families or species. In detail, we studied possible optimisations of five traditional machine learning classifiers trained with seven different categories of handcrafted features. We also fine-tuned several well-known convolutional neural networks (CNNs) and the recently proposed SeedNet to determine whether and to what extent using their deep features may be advantageous over handcrafted features. The experimental results demonstrated that CNN features are appropriate to the task and representative of the multiclass scenario. In particular, SeedNet achieved a mean F-measure of 96%, at least. Nevertheless, several cases showed satisfactory performance from the handcrafted features to be considered a valid alternative. In detail, we found that the Ensemble strategy combined with all the handcrafted features can achieve 90.93% of mean F-measure, at least, with a considerably lower amount of times. We consider the obtained results an excellent preliminary step towards realising an automatic seeds recognition and classification framework.

History of thyroid surgery

2020 ◽  
Vol 99 (11) ◽  
Keyword(s):  
Surgical Technique ◽  
20Th Century ◽  
Thyroid Surgery ◽  
History Of ◽  
Ancient Times

The authors present an outline of the development of thyroid surgery from the ancient times to the beginning of the 20th century, when the definitive surgical technique have been developed and the physiologic and pathopfysiologic consequences of thyroid resections have been described. The key representatives, as well as the contribution of the most influential czech surgeons are mentioned.

HAJJ AND THE RULERS OF

2019 ◽  
Vol 18 (2) ◽  
pp. 24-37
Author(s):  
D.X. Sangirova ◽  
Keyword(s):  
Middle Ages ◽  
Sacred Place ◽  
History Of ◽  
Ancient Times ◽  
The Middle Ages

Revered since ancient times, the concept of "sacred place" in the middle ages rose to a new level. The article analyzes one of the important issues of this time - Hajj (pilgriamge associated with visiting Mecca and its surroundings at a certain time), which is one of pillars of Islam and history of rulers who went on pilgrimage

Timing of fluorite mineralization and exhumation events in the east Central Alborz Mountains, northern Iran: constraints from fluorite (U–Th)/He thermochronometry

2021 ◽  
pp. 1-17
Author(s):  
Behnam Shafiei Bafti ◽  
István Dunkl ◽  
Saeed Madanipour
Keyword(s):  
Thermal Relaxation ◽  
Geothermal Gradient ◽  
Source Rocks ◽  
Lower Amount ◽  
Mining District ◽  
Northern Iran ◽  
East Central ◽  
Central Alborz ◽  
Ore Mineralization ◽  
History Of

Abstract The recently developed fluorite (U–Th)/He thermochronology (FHe) technique was applied to date fluorite mineralization and elucidate the exhumation history of the Mazandaran Fluorspar Mining District (MFMD) located in the east Central Alborz Mountains, Iran. A total of 32 fluorite single-crystal samples from four Middle Triassic carbonate-hosted fluorite deposits were dated. The presented FHe ages range between c. 85 Ma (age of fluorite mineralization) and c. 20 Ma (erosional cooling during the exhumation of the Alborz Mountains). The Late Cretaceous FHe ages (i.e. 84.5 ± 3.6, 78.8 ± 4.4 and 72.3 ± 3.5 Ma) are interpreted as the age of mineralization and confirm an epigenetic origin for ore mineralization in the MFMD, likely a result of prolonged hydrothermal circulation of basinal brines through potential source rocks. Most FHe ages scatter around the Eocene Epoch (55.4 ± 3.9 to 33.1 ± 1.7 Ma), recording an important cooling event after heating by regional magmatism in an extensional tectonic regime. Cooling of the heated fluorites, as a result of thermal relaxation in response to geothermal gradient re-equilibration after the end of magmatism, or exhumation cooling during extensional tectonics characterized by lower amount of erosion are most probably the causes of the recorded Eocene FHe cooling ages. Oligocene–Miocene FHe ages (i.e. 27.6 ± 1.4 to 19.5 ± 1.1 Ma) are related to the accelerated uplift of the whole Alborz Mountains, possibly as a result of the initial collision between the Afro-Arabian and Eurasian plates further to the south.

scholarly journals The Carol about the Pagan Rite of Sacrifice of a Goat and Its Interpretation in Russian Scholarship of the 19th to 20th Centuries

Religions ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 366
Author(s):  
Andrey Toporkov
Keyword(s):  
Historical Document ◽  
Authentic Texts ◽  
History Of ◽  
Ancient Times

In publications of Russian folklore, along with authentic texts there are a number of literary stylizations based on folklore. The article traces the history of one such pseudo-folkloric text—a carol which was first published by Ivan Petrovich Sakharov (1807 to 1863) in 1837. It has been established that this carol is a montage of two texts: the first is a carol, printed in 1817 by I.E. Sreznevsky in the Ukrainian Bulletin, and the second is a song included in the Tale of Brother Ivanushka and his Sister Alyonushka (SUS 450). Such contamination is unique and is found only in this one text, which was later reprinted many times. Taking into account Sakharov’s reputation as a falsifier of folklore, there is no reason to doubt that it was he who composed this carol; such contamination of works belonging to different folkloric genres is also characteristic of other of Sakharov’s publications. The carol that Sakharov published attracted the particular interest of researchers of Slavic mythology due to the fact that it described how an old man was going to sacrifice a goat. Several generations of historians saw in this pseudo-folkloric text a description of a ritual that pagan Slavs performed in ancient times. Considering the carol as an historical document, researchers of mythology built their interpretations based on the supposed time of its appearance, the nature of its genre, plot, and individual details. Thus, Sakharov’s pseudo-folkloric creation found an eager audience among scholars, and it stimulated their imagination in picturing the life of pagan Rus’.

History of Agriculture and Prices in England.

1888 ◽  
Vol 3 (3) ◽  
pp. 526 ◽  
Author(s):  
H. L. Osgood ◽  
James E. Thorold Rogers
Keyword(s):  
History Of Agriculture ◽  
History Of
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