scholarly journals Koncept ekologických fenoménů v interpretaci středoevropské vegetace [Ecological phenomena concept: the interpretation of the Central-European vegetation]

2005 ◽  
Vol 3 ◽  
pp. 47-77
Author(s):  
Tomáš Kučera
Keyword(s):  
Large Scale ◽  
Habitat Diversity ◽  
Review Of Literature ◽  
Central European ◽  
Common Features ◽  
Detailed Classification ◽  
Species Area ◽  
Extreme Habitats ◽  
Meso Scale

A review of literature referring to floristic, vegetation and habitat diversity in Bohemian Massif has resulted to a revision and detailed classification of ecological phenomena. Each phenomenon represents an open non-hierarchical system of lithological, hydrological, topoclimatic and biotic aberrations, that differ from common features of surrounded “zonal“ environment. Two main groups of ecological phenomena have been distinguished: (i) large-scale ecological geo-phenomena originated by prominent lithological factors, and (ii) meso-scale ecological topo-phenomena produced by local action of hydrology, topoclimate, and air currents. With regard to the first group, the following geo-phenomena play a particular role in the Central European vegetation: (a) sandstone, (b) limestone and dolomite (karst phenomenon), (c) marl (flysch and loess), (d) neo-volcanic, and (e) serpentinite phenomena. With regard to the latter group, the following meso-scale phenomena contribute to the diversity of habitats in landscape scenery: (f) river (or valley), (g) summit, (h) frost hollow, and (i) scree (and glacial cirque) phenomena. The “insular“ feature of the ecological phenomena in vegetation cover is expressed mainly by the occurrence of treeless ecosystems, such as swamps, bogs, marshes, steppes, rock faces and scree ecosystems, etc. Relatively higher species richness can indicate most of ecological phenomena (they should be detected by the distance from the regional species-area curve), and by the presence of rare plant species, especially by the relic and/or endemic species, which survive on extreme habitats due to the lower competition of prevailing dominant woody or graminoid species.

scholarly journals Koncept ekologických fenoménů v interpretaci středoevropské vegetace [Ecological phenomena concept: the interpretation of the Central-European vegetation]

2005 ◽  
Vol 3 ◽  
pp. 47-77
Author(s):  
Tomáš Kučera
Keyword(s):  
Large Scale ◽  
Habitat Diversity ◽  
Review Of Literature ◽  
Central European ◽  
Common Features ◽  
Detailed Classification ◽  
Species Area ◽  
Extreme Habitats ◽  
Meso Scale

A review of literature referring to floristic, vegetation and habitat diversity in Bohemian Massif has resulted to a revision and detailed classification of ecological phenomena. Each phenomenon represents an open non-hierarchical system of lithological, hydrological, topoclimatic and biotic aberrations, that differ from common features of surrounded “zonal“ environment. Two main groups of ecological phenomena have been distinguished: (i) large-scale ecological geo-phenomena originated by prominent lithological factors, and (ii) meso-scale ecological topo-phenomena produced by local action of hydrology, topoclimate, and air currents. With regard to the first group, the following geo-phenomena play a particular role in the Central European vegetation: (a) sandstone, (b) limestone and dolomite (karst phenomenon), (c) marl (flysch and loess), (d) neo-volcanic, and (e) serpentinite phenomena. With regard to the latter group, the following meso-scale phenomena contribute to the diversity of habitats in landscape scenery: (f) river (or valley), (g) summit, (h) frost hollow, and (i) scree (and glacial cirque) phenomena. The “insular“ feature of the ecological phenomena in vegetation cover is expressed mainly by the occurrence of treeless ecosystems, such as swamps, bogs, marshes, steppes, rock faces and scree ecosystems, etc. Relatively higher species richness can indicate most of ecological phenomena (they should be detected by the distance from the regional species-area curve), and by the presence of rare plant species, especially by the relic and/or endemic species, which survive on extreme habitats due to the lower competition of prevailing dominant woody or graminoid species.

scholarly journals How diversification rates and diversity limits combine to create large-scale species–area relationships

2011 ◽  
Vol 366 (1577) ◽  
pp. 2514-2525 ◽  
Author(s):  
Yael Kisel ◽  
Lynsey McInnes ◽  
Nicola H. Toomey ◽  
C. David L. Orme
Keyword(s):  
Large Scale ◽  
Species Coexistence ◽  
Mammalian Species ◽  
Habitat Diversity ◽  
Diversification Rates ◽  
Historical Factors ◽  
Global Extinction ◽  
Species Area ◽  
Highly Correlated ◽  
Using Data

Species–area relationships (SARs) have mostly been treated from an ecological perspective, focusing on immigration, local extinction and resource-based limits to species coexistence. However, a full understanding across large regions is impossible without also considering speciation and global extinction. Rates of both speciation and extinction are known to be strongly affected by area and thus should contribute to spatial patterns of diversity. Here, we explore how variation in diversification rates and ecologically mediated diversity limits among regions of different sizes can result in the formation of SARs. We explain how this area-related variation in diversification can be caused by either the direct effects of area or the effects of factors that are highly correlated with area, such as habitat diversity and population size. We also review environmental, clade-specific and historical factors that affect diversification and diversity limits but are not highly correlated with region area, and thus are likely to cause scatter in observed SARs. We present new analyses using data on the distributions, ages and traits of mammalian species to illustrate these mechanisms; in doing so we provide an integrated perspective on the evolutionary processes shaping SARs.

scholarly journals Typosquatting for Fun and Profit: Cross-Country Analysis of Pop-Up Scam

2020 ◽  
Author(s):  
Tobias Dam ◽  
Lukas Daniel Klausner ◽  
Sebastian Schrittwieser
Keyword(s):  
Large Scale ◽  
The United States ◽  
Interface Element ◽  
User Agent ◽  
Ip Address ◽  
Internet Users ◽  
Detailed Classification ◽  
Depth Analysis ◽  
Country Analysis

Today, many different types of scams can be found on the internet. Online criminals are always finding new creative ways to trick internet users, be it in the form of lottery scams, downloading scam apps for smartphones or fake gambling websites. This paper presents a large-scale study on one particular delivery method of online scam: pop-up scam on typosquatting domains. Typosquatting describes the concept of registering domains which are very similar to existing ones while deliberately containing common typing errors; these domains are then used to trick online users while under the belief of browsing the intended website. Pop-up scam uses JavaScript alert boxes to present a message which attracts the user’s attention very effectively, as they are a blocking user interface element. Our study among typosquatting domains derived from the Majestic Million list utilising an Austrian IP address revealed on 1219 distinct typosquatting URLs a total of 2577 pop-up messages, out of which 1538 were malicious. Approximately a third of those distinct URLs (403) were targeted and displayed pop-up messages to one specific HTTP user agent only. Based on our scans, we present an in-depth analysis as well as a detailed classification of different targeting parameters (user agent and language) which triggered varying kinds of pop-up scams. Furthermore, we expound the differences of current pop-up scam characteristics in comparison with a previous scan performed in late 2018 and examine the use of IDN homograph attacks as well as the application of message localisation using additional scans with IP addresses from the United States and Japan.

A. J. Ellis As Dialectologist

1991 ◽  
Vol 18 (2-3) ◽  
pp. 321-334 ◽  
Author(s):  
Graham Shorrocks
Keyword(s):  
Large Scale ◽  
Direct Method ◽  
Reform Movement ◽  
The Past ◽  
Detailed Classification ◽  
History Of ◽  
Large Scale Survey ◽  
Important Position ◽  
Printed Sources

Summary Alexander John Ellis (1814–1890) occupies an important position within the history of phonetics and that of the spelling reform movement. In this article, it is argued that Ellis’s standing as a dialectologist might profitably be reassessed. All too often in the past, Ellis’s work in the field of dialectology has been adversely criticized, underestimated or even completely ignored. Yet Ellis’s dialectological work was pioneering in many ways: he produced the first large-scale survey of English dialects, rejecting printed sources and using the direct method in part; invented an intricate system of phonetic notation (the palaeotype); produced a detailed classification of the English dialects; and illustrated his classification by means of two summary maps complete with isoglosses. A number of scholars have reported in recent years that the results of their investigations accord well with Ellis’s findings. These facts are sufficient to warrant a reassessment of Ellis’s position in the history of English dialectology, and, more generally, within the history of linguistic geography as a whole.

Research on Automatic Recognition of Separable Words in Modern Chinese

2014 ◽  
Vol 670-671 ◽  
pp. 1493-1498
Author(s):  
Xin Fu Li ◽  
Bo Liu ◽  
Xue Dong Tian
Keyword(s):  
Large Scale ◽  
Structure Type ◽  
The Novel ◽  
New Approach ◽  
Chinese Information Processing ◽  
Detailed Classification ◽  
Extended Component ◽  
Open Test ◽  
Teaching Chinese

Separable words have important applications in many fields such as Chinese information processing, Chinese-English translation, teaching Chinese as a foreign language. There are about five thousand separable words distribute in the corpus of Chinese, and the word frequency is greater in the novel, so the study on identification of separable words is significant. This paper selects the higher discrete frequency of verb-object separable words as the object of the study, by examining the manifestation of extended components in different separable words and giving summary and detailed classification of the extended components on the large-scale corpus, a new approach is designed based on the words segmentation and the structure type of extended component. According to the experiments of identification mark to separable words of verb-object type, the average recall is 89.54% and the average precision is 87.43% in open test. The experimental results show that the method is effective.

scholarly journals Extraction of Coronary Atherosclerotic Plaques From Computed Tomography Imaging: A Review of Recent Methods

2021 ◽  
Vol 8 ◽  
Author(s):  
Haipeng Liu ◽  
Aleksandra Wingert ◽  
Jian'an Wang ◽  
Jucheng Zhang ◽  
Xinhong Wang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Large Scale ◽  
Three Dimensional ◽  
Coronary Plaque ◽  
Ct Images ◽  
Atherosclerotic Plaques ◽  
Detailed Classification ◽  
3D Geometry ◽  
Artery Disease

Background: Atherosclerotic plaques are the major cause of coronary artery disease (CAD). Currently, computed tomography (CT) is the most commonly applied imaging technique in the diagnosis of CAD. However, the accurate extraction of coronary plaque geometry from CT images is still challenging.Summary of Review: In this review, we focused on the methods in recent studies on the CT-based coronary plaque extraction. According to the dimension of plaque extraction method, the studies were categorized into two-dimensional (2D) and three-dimensional (3D) ones. In each category, the studies were analyzed in terms of data, methods, and evaluation. We summarized the merits and limitations of current methods, as well as the future directions for efficient and accurate extraction of coronary plaques using CT imaging.Conclusion: The methodological innovations are important for more accurate CT-based assessment of coronary plaques in clinical applications. The large-scale studies, de-blooming algorithms, more standardized datasets, and more detailed classification of non-calcified plaques could improve the accuracy of coronary plaque extraction from CT images. More multidimensional geometric parameters can be derived from the 3D geometry of coronary plaques. Additionally, machine learning and automatic 3D reconstruction could improve the efficiency of coronary plaque extraction in future studies.

Use of photodynamic therapy for photodamage skin (review of literature)

2019 ◽  
Vol 1 (7) ◽  
pp. 19-23
Author(s):  
S. I. Surkichin ◽  
N. V. Gryazeva ◽  
L. S. Kholupova ◽  
N. V. Bochkova
Keyword(s):  
Photodynamic Therapy ◽  
Comparative Evaluation ◽  
Clinical Manifestations ◽  
Light Sources ◽  
Review Of Literature ◽  
Photosensitizing Agents ◽  
Selection Of

The article provides an overview of the use of photodynamic therapy for photodamage of the skin. The causes, pathogenesis and clinical manifestations of skin photodamage are considered. The definition, principle of action of photodynamic therapy, including the sources of light used, the classification of photosensitizers and their main characteristics are given. Analyzed studies that show the effectiveness and comparative evaluation in the selection of various light sources and photosensitizing agents for photodynamic therapy in patients with clinical manifestations of photodamage.

Classification of woody-shrub vegetation of the forest-steppe complex of Privolzhskaya Upland

2009 ◽  
pp. 27-53
Author(s):  
A. Yu. Kudryavtsev
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Dominant Species ◽  
Large Scale ◽  
Nature Reserve ◽  
Vegetation Mapping ◽  
Vegetation Classification ◽  
Forest Steppe ◽  
Mapping Data

Diversity of plant communities in the nature reserve “Privolzhskaya Forest-Steppe”, Ostrovtsovsky area, is analyzed on the basis of the large-scale vegetation mapping data from 2000. The plant community classi­fication based on the Russian ecologic-phytocoenotic approach is carried out. 12 plant formations and 21 associations are distinguished according to dominant species and a combination of ecologic-phytocoenotic groups of species. A list of vegetation classification units as well as the characteristics of theshrub and woody communities are given in this paper.

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