scholarly journals Virus Graph and COVID-19 Pandemic: A Graph Theory Approach

Author(s):  
H. R. Bhapkar ◽  
Parikshit Mahalle ◽  
Prashant S. Dhotre

Graph theory plays significant role in every field of science as well as technology. Every situation can be articulated in terms of suitable graphs by using various approaches of graph theory. Considering the recent pandemic in the world and the precautions taken for prevention of the COVID 19, it is the most appropriate way to exercise the graph models with theoretical as well as practical aspects to control this epidemic. This paper defines the variable set, variable graphs and their types with respect to variable vertex sets and variable edge sets. Depending upon the nature of the pandemic, there are four types of Virus graphs. Virus graph I and III are not so perilous for all living beings. Although, Virus graphs II and IV are extremely hazardous for the harmony of the world. In view of different aspects for expand of pandemic, growth types of virus graphs are divided in 1-1, 1-P and 1-all growth types. The COVID19 initially was in Virus graph-I type, but presently it is in Virus graph-II types. We present the table involving the number of infected people after n days with respect to different values of P and growth rates with I0 = 100. Moreover, the country wise starting dates of stages of the virus graph-I and II are specified. The concept of cut sets is applicable for prevention of COVID19 and the whole world is using the same analogy.

10.12737/1471 ◽  
2013 ◽  
Vol 1 (4) ◽  
pp. 11-14 ◽  
Author(s):  
Басовский ◽  
Leonid Basovskiy

Growth rates of the South-American economies are assessed against the world economy growth rate. Turning points in economic development are identified based on the catastrophe theory approach, namely, by evaluating variances in the rates of economic growth. Turning points of economic growth are identified for the world economy and also for Brazil, Venezuela, Colombia and Chile. The said countries have grown faster than the world economy: Chile, Colombia and Venezuela have demonstrated the 4,5–5,5% growth rate, and Brazil – 3%. In terms of growth sustainability the said four countries could be ranged as follows (in descending order): Colombia, Brazil, Chile, Venezuela. All the four could be prospective business and trading partners. In terms of economic growth rates and sustainability or growth the most promising partners are Colombia and Brazil, followed by Chile and Venezuela as slightly less promising partners


2020 ◽  
Vol 63 (10) ◽  
pp. 74-87
Author(s):  
Irina N. Sidorenko

 The author analyzes the conceptions of ontological nihilism in the works of S. Kierkegaard, F. Nietzsche, M. Heidegger, E. Jünger. On the basis of this analysis, violence is defined as a manifestation of nihilism, of the “will to nothingness” and hypertrophy of the self-will of man. The article demonstrates the importance of the problem of nihilism. The nihilistic thinking of modern man is expressed in the attitude toward a radical transformation of the world from the position of his “absolute” righteousness. The paradox of the current situation is that there is the reverse side of this transformative activity, when there is only the appearance of action and the dilution of responsibility. Confidence in the rightness of own views and beliefs increases the risk of the violent imposition of own vision of reality. Historical and philosophical reconstruction of the conceptions of nihilism allowed to reveal the following projects of its comprehension and resolution: (1) the project of “positing of values,” which consists in the transformation of the evaluation, which is understood as another perspective of positing values, leading to the affirmation of being; (2) the project of overcoming nihilism from the space of temporality, carried out through the resoluteness to accept the historicity of own existence; (3) the project of overcoming nihilism as the oblivion of being from the spatial perspective of the “line,” allowing to realize the “glimpse” of being. The author concludes that it is impossible to solve the problem of violence and its various forms of its manifestation without overcoming “ontological nihilism.” Significant role in solving the problem of ontological violence is assigned to philosophy as a critical and responsible form of thinking, which is capable to help a person to bear the burden of the world, to provide meanings and affirm being, as well as to unite people and resist the fundamentalist claims of exclusivity and rightness.


Author(s):  
Mohammad Karimi

Dental and oral health is an important part that plays a significant role in the quality of life of people in our society, especially children, but due to insufficient attention, tooth decay in the world is increasing every year. Promoting oral hygiene requires the people's easy access to primary oral health care and the use of these services should be classified.


2015 ◽  
Vol 8 (1and2) ◽  
Author(s):  
Parvi Bharti

Film tourism is quite a new concept, it is also referred to as film-induced or movie-induced tourism. It promotes the tourism advantage induced for any destination or country due to its exposure to public through the film media. This concept is at its nascent stage in the world. Many countries are found to work on this concept after realizing the benefits which can be reaped by their people, society and economy as a whole. Every theory, if advantageous, also tends to present some challenges. This mode of tourism promotion has its own benefits and challenges too for the administration, but, it depends on the government: local and central both, to make use of the concept in the manner befitting most for the locales and the economy. The international or worldwide famous films have been found to do wonders to the inflow of tourist for the country and shooting destinations in specific. Various governments have also started playing a significant role, and contributing by providing assistance to the film producers. In India we have had films promoting various destinations in the country itself through our own Bollywood, whereas some films under the international banner also have had some scenes or part of the film shot in the country. It would be of immense benefit to use this concept for the tourism industry of the country, but before that, it is essential to be prepared to deliver the required infrastructure and facilities. The study of this model is quite complex and requires an exhaustive research to understand the benefits (in exact measures) any country can reap for its economy. This paper aims to induce further research in the field and integrate the efforts and research in the field of tourism and management.


2018 ◽  
Vol 16 (2) ◽  
pp. 527-535 ◽  
Author(s):  
J. BEYZA ◽  
J. M. Yusta ◽  
G. J. Correa ◽  
H. F. Ruiz

2017 ◽  
Vol 8 (6) ◽  
pp. 4475-4488 ◽  
Author(s):  
Takayoshi Yoshimura ◽  
Satoshi Maeda ◽  
Tetsuya Taketsugu ◽  
Masaya Sawamura ◽  
Keiji Morokuma ◽  
...  

The reaction mechanism of the cationic rhodium(i)–BINAP complex catalysed isomerisation of allylic amines was explored using the artificial force induced reaction method with the global reaction route mapping strategy.


2003 ◽  
Vol 15 (3) ◽  
pp. 167-171 ◽  
Author(s):  
John J. Issa ◽  
Chandana Jayawardena

Seeks to review the all‐inclusive concept in the context of the Caribbean. The origin of all‐inclusives in the world and the Caribbean is analysed. The concept was first introduced in holiday camps in Britain during the 1930s. Club Med is credited for popularizing the concept globally in the 1950s. However, the credit of introducing a luxury version of the all‐inclusive concept goes to a Jamaican hotelier and co‐author of this article. In defining the concept of all‐inclusives, one cannot ignore the significant role Jamaica has played. Currently, Jamaica has 17 of the best 100 all‐inclusive resorts in the world. Even though all‐inclusives are occasionally criticized, they are seen as a necessary evil. Concludes by predicting that all‐inclusives are here to stay in the Caribbean and will play a major role in tourism for the foreseeable future.


2016 ◽  
Vol 46 (7) ◽  
pp. 914-923 ◽  
Author(s):  
Jonathan L.W. Ruppert ◽  
Marie-Josée Fortin ◽  
Eldon A. Gunn ◽  
David L. Martell

The fragmentation and loss of old-growth forest has led to the decline of many forest-dwelling species that depend on old-growth forest as habitat. Emblematic of this issue in many areas of the managed boreal forest in Canada is the threatened woodland caribou (Rangifer tarandus caribou (Gmelin, 1788)). We develop a methodology to help determine when and how timber can be harvested to best satisfy both industrial timber supply and woodland caribou habitat requirements. To start, we use least-cost paths based on graph theory to determine the configuration of woodland caribou preferred habitat patches. We then developed a heuristic procedure to schedule timber harvesting based on a trade-off between merchantable wood volume and the remaining amount of habitat and its connectivity during a planning cycle. Our heuristic can attain 84% of the potential woodland caribou habitat that would be available in the absence of harvesting at the end of a 100 year planning horizon. Interestingly, this is more than that which is attained by the current plan (50%) and a harvesting plan that targets high volume stands (32%). Our results indicate that our heuristic procedure (i.e., an ecologically tuned optimization approach) may better direct industrial activities to improve old-growth habitat while maintaining specified timber production levels.


Author(s):  
I Ketut Suardana ◽  

Pan Balang Tamak text is one of Balinese narrative texts developing in Balinese communities. This text contains very deep moral value that is very useful for communities to achieve happiness in the world. The moral values embed in the clauses constructing the text in metaphorical meaning. Many clauses constructing the text contain verbal group complexes in which describe kinds of actions done by the participants. This paper analyzes the application of verbal group complexes in Pan Balang Tamak text written by Suptra (2014). The theory used to analyze the verbal group complexes is the theory of group complex from Systemic Functional Linguistics from Halliday (2014). The paper used qualitative research, namely by the theory approach, the technique used is based on syntagmatic and paradigmatic based on field, tenor, mode. The result of the research suggested that both verbal group complexes in paratactic and in hypotactic were found in the text. Paratactic can be found in the way of the communities respect their bad behavior and the real condition happening to all animal living in the forest. The hypotactic were found the clauses which contain the effort to trap Pan Balang Tamak and the advantages obtained by Pan Balang Tamak from the efforts which be trap Pan Balang Tamak. Projection verb can be found in verbal process in which mean proposal, namely, the willing to trap Pan Balang Tamak


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