scholarly journals The Errors in Visual Estimation of Plants Cover in the Context of Education of Phytosociology

2016 ◽  
Vol 21 (1-2) ◽  
pp. 75-82
Author(s):  
Damian Chmura ◽  
Anna Salachna
Keyword(s):  
Plant Cover ◽  
Field Method ◽  
Point Method ◽  
Visual Estimation ◽  
Vegetation Science ◽  
The Common ◽  
Very High ◽  
Common Field ◽  
Forest Floor Vegetation ◽  
Medium Correlation

AbstractIn vegetation science including phytosociology, visual estimates of plant cover and point method belong to the common field method to record species composition and their abundance. Two methods were compared: Braun-Blanquet scale and point method using Levy bridge. A group of students performed measurements in five plots belonged to an oak-hornbeam forest Tilio-Carpinetum. It was revealed that there is a very high discrepancy in a observed number of species. Total mean numbers obtained are 13.4 and 31.2 for point method and Braun-Blanquet method respectively. However, there is the significant positive and medium correlation between two methods in terms of estimation of abundance of species. It can be concluded that point-method is not suitable for study of forest floor vegetation. It can be merged with other methods. Due to many repetitive measures, it can be helpful in learning of recognition of species.

scholarly journals Common issues in the hetero-epitaxial seeding on SiC substrates in the sublimation growth of AlN crystals

2021 ◽  
Vol 127 (8) ◽  
Author(s):  
R. Radhakrishnan Sumathi
Keyword(s):  
Power Electronic ◽  
Etch Pit ◽  
Micro Hole ◽  
Wet Chemical ◽  
The Common ◽  
Common Problems ◽  
Hole Defects ◽  
Sublimation Growth ◽  
Impurity Elements ◽  
Very High

AbstractAluminium nitride (AlN) is a futuristic material for efficient next-generation high-power electronic and optoelectronic applications. Sublimation growth of AlN single crystals with hetero-epitaxial approach using silicon carbide substrates is one of the two prominent approaches emerged, since the pioneering crystal growth work from 1970s. Many groups working on this hetero-epitaxial seeding have abandoned AlN growth altogether due to lot of persistently encountered problems. In this article, we focus on most of the common problems encountered in this process such as macro- and micro-hole defects, cracks, 3D-nucleation, high dislocation density, and incorporation of unintentional impurity elements due to chemical decomposition of the substrate at very high temperatures. Possible ways to successfully solve some of these issues have been discussed. Other few remaining challenges, namely low-angle grain boundaries and deep UV optical absorption, are also presented in the later part of this work. Particular attention has been devoted in this work on the coloration of the crystals with respect to chemical composition. Wet chemical etching gives etch pit density (EPD) values in the order of 105 cm-2 for yellow-coloured samples, while greenish coloration deteriorates the structural properties with EPD values of at least one order more.

Molecule-Based Magnets—An Overview

MRS Bulletin ◽  
2000 ◽  
Vol 25 (11) ◽  
pp. 21-30 ◽  
Author(s):  
Joel S. Miller ◽  
Arthur J. Epstein
Keyword(s):  
Low Temperature ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Magnetic Ordering ◽  
Low Density ◽  
Materials Properties ◽  
The Common ◽  
New Processing ◽  
Very High

Molecule-based magnets are a broad, emerging class of magnetic materials that expand the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other properties such as photoresponsiveness. Essentially all of the common magnetic phenomena associated with conventional transition-metal and rare-earth-based magnets can be found in molecule-based magnets. Although discovered less than two decades ago, magnets with ordering temperatures exceeding room temperature, very high (∼27.0 kOe or 2.16 MA/m) and very low (several Oe or less) coercivities, and substantial remanent and saturation magnetizations have been achieved. In addition, exotic phenomena including photoresponsiveness have been reported. The advent of molecule-based magnets offers new processing opportunities. For example, thin-film magnets can be prepared by means of low-temperature chemical vapor deposition and electrodeposition methods.

Spectrum of Imaging Findings in Rhino-Orbito-Cerebral Mucormycosis (ROCM) in Post COVID Patients - A Pictorial Review with Clinico-Radiological Correlation

2021 ◽  
Vol 8 (41) ◽  
pp. 3584-3590
Author(s):  
Devarajan Ellezhutil ◽  
Sajeeth Kumar Govindan Keeriyatt ◽  
Sunil Kumar Kunhiparambath ◽  
John Jimmy Nalappat
Keyword(s):  
Early Diagnosis ◽  
Virus Disease ◽  
Vital Role ◽  
Fungal Sinusitis ◽  
Mri Findings ◽  
Pictorial Review ◽  
Radiological Patterns ◽  
The Common ◽  
Magnetic Resonance Imaging Mri ◽  
Very High

BACKGROUND Rhino-orbito-cerebral mucormycosis (ROCM) is a devastating fungal infection with very high rates of mortality. Many patients post corona virus disease (COVID) infection are increasingly being diagnosed with mucormycosis (black fungus). Imaging being central to the early diagnosis of the infection, the study aims to characterize the major radiological patterns of involvement of mucormycosis. Computed tomography (CT) & magnetic resonance imaging (MRI) findings of 10 patients who were subsequently conformed to have mucormycosis were analyzed and 7 major patterns of involvement were detected. Imaging plays a vital role in the early diagnosis of ROCM. Knowledge about the common patterns of spread helps in picking the subtle signs of infection. KEYWORDS Mucormycosis, Post COVID, Fungal Sinusitis, ROCM

scholarly journals On the nature and role of Consciousness: is it time to move towards a metaphilosophical and metascientific approach?

2021 ◽  
Author(s):  
ENRICO FACCO ◽  
Fabio Fracas ◽  
Silvano Tagliagambe ◽  
Patrizio Tressoldi
Keyword(s):  
Anthropic Principle ◽  
First Person ◽  
Proper Understanding ◽  
Person Perspective ◽  
Key Concepts ◽  
The Common ◽  
First Person Perspective ◽  
The Mind ◽  
Common Field

The main aim of this paper is to support a metaphilosophical and metascientific approach to the study of Consciousness.After a brief historical resume of the debate between the mind-brain-body relationship, we discuss how the apparently irreducible contention between a physicalist and an anti-physicalist interpretation of Consciousness can be overcome by a metaphilosophic and metascientific approach in the attempt to overcome ethnocentric cultural filters and constraints yielded by the Weltanschauung and the Zeitgeist one belongs to. IN fact, a metaphilosophical perspective can help to recognize key concepts and meanings common to different philosophies beyond their formal differences and different modes of theorization, where the common field of reflection is aimed to find the problem’s unity in the multiplicity of forms. Likewise, the metascientific approach, such as the anthropic principle adopted in astrophysics, helps overcoming the problems of indecidability of single axiomatic disciplines.A metaphilosophical and metascientific approach seems appropriate in the study of consciousness and subjective phenomena, since the first-person perspective and the meaning of the experience are the condition sine qua non for their proper understanding.

Reconfiguring Regional Interactions in the Face of Cahokian Decline

2018 ◽  
Author(s):  
Meghan E. Buchanan
Keyword(s):  
United States ◽  
Political Change ◽  
Interaction Model ◽  
Cross Cultural ◽  
Field Site ◽  
Mississippian Period ◽  
The Face ◽  
The Common ◽  
Third Dimension ◽  
Common Field

The early Mississippian Period in the midwestern United States was a time of great religious, social, economic, and political change. Several models and theories have been proposed for understanding changes in regional interactions associated with the rise of Cahokia, the largest Mississippian city. However, the later dissolution of Cahokia and other Mississippian centers during the twelfth through fourteenth centuries and their impacts on regional interactions are poorly understood. This chapter assesses the utility of the Cross-Cultural Interaction Model for Mississippian Period during the late twelfth through fourteenth centuries in the Midwest. Additionally, this chapter proposes the addition of a third dimension to the model in order to account for indigenous ontological perspectives with regard to entanglements between political reorganization and cosmological realms. Particular attention is given to the Common Field site, a political and religious center located in a region that had been sparsely populated prior to AD 1200.

scholarly journals Model Fusion for Building Type Classification from Aerial and Street View Images

2019 ◽  
Vol 11 (11) ◽  
pp. 1259 ◽  
Author(s):  
Eike Jens Hoffmann ◽  
Yuanyuan Wang ◽  
Martin Werner ◽  
Jian Kang ◽  
Xiao Xiang Zhu
Keyword(s):  
Early Stage ◽  
Destructive Effect ◽  
Street View ◽  
Learning Techniques ◽  
The Common ◽  
Diverse Ensemble ◽  
Type Classification ◽  
Level Fusion ◽  
Very High ◽  
Image Type

This article addresses the question of mapping building functions jointly using both aerial and street view images via deep learning techniques. One of the central challenges here is determining a data fusion strategy that can cope with heterogeneous image modalities. We demonstrate that geometric combinations of the features of such two types of images, especially in an early stage of the convolutional layers, often lead to a destructive effect due to the spatial misalignment of the features. Therefore, we address this problem through a decision-level fusion of a diverse ensemble of models trained from each image type independently. In this way, the significant differences in appearance of aerial and street view images are taken into account. Compared to the common multi-stream end-to-end fusion approaches proposed in the literature, we are able to increase the precision scores from 68% to 76%. Another challenge is that sophisticated classification schemes needed for real applications are highly overlapping and not very well defined without sharp boundaries. As a consequence, classification using machine learning becomes significantly harder. In this work, we choose a highly compact classification scheme with four classes, commercial, residential, public, and industrial because such a classification has a very high value to urban geography being correlated with socio-demographic parameters such as population density and income.

Development of Turgida turgida (Rudolphi, 1819) in the common field cricket (Acheta pennsylvanicus Burmeister)

1982 ◽  
Vol 60 (9) ◽  
pp. 2134-2142 ◽  
Author(s):  
J. B. Gray ◽  
R. C. Anderson
Keyword(s):  
Field Cricket ◽  
Suitable Host ◽  
The Common ◽  
Common Field

Several species of orthopterans and coleopterans were experimentally infected with Turgida turgida. The common field cricket, Acheta pennsylvanicus, was the most suitable host. Eggs of T. turgida usually hatched in the ileum of crickets. Larvae were observed in the wall of the ieum 4 h postinfection. Larvae became encapsulated in the gut wall and moulted twice. At 30 °C the first moult occurred 5 days and the second one 10 days after infection. Larvae are described in detail. The intensity of T. turgida in crickets could be augmented by challenge infections.

Variations in seed dormancy and rates of development of great brome, Bromus diandrus Roth., as adaptations to the climates of southern Australia and implications for weed control

1985 ◽  
Vol 36 (2) ◽  
pp. 295 ◽  
Author(s):  
GS Gill ◽  
WM Blacklow
Keyword(s):  
Seed Dormancy ◽  
Cropping Systems ◽  
Storage Conditions ◽  
Environment Interaction ◽  
Dormant Seed ◽  
Field Site ◽  
Bromus Diandrus ◽  
Genotype X Environment ◽  
The Common ◽  
Common Field

Seeds of great brome, B. diandrus, were collected from 14 sites across southern Australia and sown at Perth, W.A. The duration of seed dormancy varied among the seed accessions when produced at the common field site of Perth, which suggested that variations in dormancy were genetically controlled. The environment of Perth shortened the duration of dormancy in all the accessions but did not affect their ranking, indicating a lack of genotype x environment interaction. The duration of dormancy was positively correlated (r = 0.78) with the duration of the rain-free summers of the site of collection. Dormancy was not due to hard-seededness and non-dormant seeds germinated within 40 h of wetting at 20�C. The seed dormancy was limited to about 5 months under the storage conditions examined. Dormant seed was stimulated to germinate by gibberellic acid (2.89 mM) and dormant seed of the accession from Geraldton also responded to removal of the lemma and palea or to leaching with water. The time taken for accessions to 'panicle peep' was positively correlated (r = 0.83) with the length of the rainy winters of the sites of collection. The results show great brome has adapted genetically to the climate of southern Australia. Cropping systems that exploit the lack of residual dormancy and the potential for rapid and complete germination s

The common field of research and clinical psychiatry

1927 ◽  
Vol 1 (3) ◽  
pp. 276-291 ◽  
Author(s):  
Harry Stack Sullivan
Keyword(s):  
Clinical Psychiatry ◽  
The Common ◽  
Common Field
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