Network Analysis of Northern Queensland Tropical Rainforests

1984 ◽  
Vol 32 (1) ◽  
pp. 109 ◽  
Author(s):  
WT Williams ◽  
JG Tracey
Keyword(s):  
Graph Theory ◽  
Network Analysis ◽  
Rain Forest ◽  
Ecological Systems ◽  
Humid Tropics ◽  
Tropical Rainforests ◽  
Ecological Problem ◽  
Forest Sites ◽  
Neighbour Network ◽  
Good Agreement

The graph theory of a 'two-neighbour network' is explained, and its potential advantages for the elucidation of complex ecological systems are outlined. The method is used for the analysis of a difficult set of 146 tropical rain forest sites, defined by the presence or absence of 740 tree species, in the humid tropics of N. Queensland. It is shown that the results greatly clarify a complex ecological problem, and that they are in unexpectedly good agreement with a preexisting intuitive classification.

The estimation of temporal processes in tropical rain forest: a study of primary mixed dipterocarp forest in Indonesia

1985 ◽  
Vol 1 (2) ◽  
pp. 171-182 ◽  
Author(s):  
Soedarsono Riswan ◽  
J. B. Kenworthy ◽  
Kuswata Kartawinata
Keyword(s):  
Time Scale ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Gap Formation ◽  
Growth Rings ◽  
Secondary Species ◽  
East Kalimantan ◽  
Forest Sites ◽  
Time Required ◽  
Individual Trees

ABSTRACTIn the absence of growth rings it is difficult to give a precise time scale for processes associated with the re-establishment of tropical rain forest. This paper explores other methods by which a time scale may be constructed. The proportions of primary and secondary species, an index of similarity, biomass measurements, girth dimensions and gap size are all considered from sites in East Kalimantan, Indonesia. Data from primary, secondary and experimentally cleared forest sites are compared to estimate the minimum time required for various phases involved in the re-establishment of tropical rain forest after disturbance. A simple model is proposed to accommodate the data and other estimates in the literature. The model predicts a minimum period for the stablization of secondary species numbers as 60–70 years and the replacement of primary species as 150 years at which point gap formation is initiated. After approximately 220–250 years biomass stabilizes while individual trees exist for over 500 years.

Network Analysis of World Subway Systems Using Updated Graph Theory

2009 ◽  
Vol 2112 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Sybil Derrible ◽  
Christopher Kennedy
Keyword(s):  
Graph Theory ◽  
Network Analysis

Some Relevant Aspects of Network Analysis and Graph Theory

2008 ◽  
pp. 361-424 ◽  
Author(s):  
Geoffrey S. Canright ◽  
Kenth Engø-Monsen
Keyword(s):  
Graph Theory ◽  
Network Analysis

scholarly journals Group Measures and Modeling for Social Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Vincent Levorato
Keyword(s):  
Complex System ◽  
Social Networks ◽  
Graph Theory ◽  
Social Network ◽  
Social Network Analysis ◽  
Network Analysis ◽  
Network Modeling ◽  
Complex Interactions ◽  
Social Network Modeling

Social network modeling is generally based on graph theory, which allows for study of dynamics and emerging phenomena. However, in terms of neighborhood, the graphs are not necessarily adapted to represent complex interactions, and the neighborhood of a group of vertices can be inferred from the neighborhoods of each vertex composing that group. In our study, we consider that a group has to be considered as a complex system where emerging phenomena can appear. In this paper, a formalism is proposed to resolve this problematic by modeling groups in social networks using pretopology as a generalization of the graph theory. After giving some definitions and examples of modeling, we show how some measures used in social network analysis (degree, betweenness, and closeness) can be also generalized to consider a group as a whole entity.

scholarly journals Graph theory-based network analysis of regional uncertainties of the US Economy

2020 ◽  
Vol 540 ◽  
pp. 123064 ◽  
Author(s):  
Rangan Gupta ◽  
Chi-Keung (Marco) Lau ◽  
Xin Sheng
Keyword(s):  
Graph Theory ◽  
Network Analysis ◽  
Us Economy ◽  
The Us

An investigation into colour combination in paintings via graph theory

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Samaneh Jolany Vangah ◽  
Yousef Jamali ◽  
Mozaffar Jamali
Keyword(s):  
Image Processing ◽  
Graph Theory ◽  
Network Analysis ◽  
Visual Arts ◽  
Digital Image ◽  
Degree Distribution ◽  
Network Science ◽  
Node Centrality ◽  
Classification Of Images

Abstract In visual arts, painting is deeply reliant on the colour combination for its impact, depth and emotion. Recently, many studies have focused on image processing, regarding identification and classification of images, using some colour features such as saturation, hue, luminance and so forth. This study aims to delve into some of the painting styles from the perspective of graph theory and network science. We compared a number of famous paintings to find out the likely pattern that an artist uses for colour combination and juxtaposition. To achieve this aim, the digital image of a painting is converted to a graph where each vertex represents one of the painting’s colours. In this graph, two vertices would be adjacent if and only if the two relative colours could be found in at least two adjacent pixels in the digital image. Among the several tools for network analysis, clustering, node centrality and degree distribution are used. Outcomes showed that artists unconsciously are following subtle mathematical rules to reach harmony and coordination in their work.

scholarly journals Mahoganies: candidates for the Red Data Book

Oryx ◽  
1983 ◽  
Vol 17 (2) ◽  
pp. 88-94 ◽  
Author(s):  
Sabina G. Knees ◽  
Martin F. Gardner
Keyword(s):  
Pilot Study ◽  
Rain Forest ◽  
General Pattern ◽  
Hardwood Forests ◽  
Tropical Rainforests ◽  
Dramatic Decrease ◽  
Trade Patterns ◽  
Red Data Book ◽  
Data Book ◽  
Over Exploitation

Mahogany ranks as one of the world's finest timbers and it will probably be commercially extinct by 1990. The dramatic decrease in trade of true mahogany as well as a switch to previously untapped resources since the early 1970s reflects a general pattern of over-exploitation of tropical rainforests. The lack of mahogany cultivation and a move into other, unrelated mahoganylike, primary rain forest hardwoods, such as meranti and red lauan, emphasises an inevitable and irreversible decline for many hardwood forests. The authors give a summary of historical and current trade patterns in mahogany as part of a pilot study initiated and sponsored by ffPS in 1982.

Seed Sharing in Amazonian Indigenous Rain Forest Communities: a Social Network Analysis in three Achuar Villages, Peru

Human Ecology ◽  
2016 ◽  
Vol 44 (5) ◽  
pp. 577-594 ◽  
Author(s):  
Christian Abizaid ◽  
Oliver T. Coomes ◽  
Mathilde Perrault-Archambault
Keyword(s):  
Social Network ◽  
Social Network Analysis ◽  
Network Analysis ◽  
Rain Forest ◽  
Forest Communities

scholarly journals Representation of Graph Theory in Students’ Communication Network at Female Students’ Dormitory of State Islamic Institute of Palopo

CAUCHY ◽  
2016 ◽  
Vol 4 (2) ◽  
pp. 95
Author(s):  
Muhammad Hajarul Aswad ◽  
Wahyuni Husain
Keyword(s):  
Communication Network ◽  
Graph Theory ◽  
Network Analysis ◽  
Network Structure ◽  
Significant Influence ◽  
Female Students ◽  
Path Distance

The application of Graph Theory Concept in Communication Network Analysis is interesting to observe. This research was carried out to learn how Communication Network structure was formed and who had necessary role in the network. It was explorative research and conducted at Female Students’ Dormitory of State Islamic Institute of Palopo (Asrama Putri IAIN Palopo). The results were interpreted by using Microsoft NodeXL Version 1.0.1.113. It was found that the communication network structure of female students’ who stayed at the Dormitory decentralized. It shows that each student had same opportunity to communicate one another directly or indirectly, which 4 to 9 path distance. It was also identified that from 110 people, Suarni was the student who had significant influence in the communication network.

scholarly journals TEACHER ILLNESS: A SEMANTIC NETWORK ANALYSIS BASED ON GRAPH THEORY

2019 ◽  
Vol 20 (3) ◽  
pp. 682-697
Author(s):  
Andréa Couto ◽  
Maély Ramos ◽  
Enizete Ferreira ◽  
Maria Furtado ◽  
Jamille Silva
Keyword(s):  
Graph Theory ◽  
Network Analysis ◽  
Semantic Network ◽  
Semantic Network Analysis
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