Time space analysis of dams in the State of Pará in the last 20 years

Author(s):  
Daniel Rodrigues Chaves ◽  
Junior Hiroyuki Ishihara ◽  
Ítalo Oliveira Ferreira ◽  
Aaron Kadima Lukanu Lwa Nzambi
Keyword(s):  
2018 ◽  
Vol 10 (2) ◽  
pp. 1-14
Author(s):  
Felix Lo

In the 20th century, several scholars across different disciplines have explored the relations between sociality and the associated perceptions of time and space. This paper draws on their theories to study how the Facebook News Feed feature inscribes users with a certain kind of temporality and spatiality. Building on Manual Castells' characterization of online activities as a "temporal collage" it argues that, through the interactions with News Feeds, users encounter the desequencing of the temporality of their social space. It further analyzes a News Feed page as a temporal object as defined by Bernard Stiegler, and adopts his critique of cinematic time to reveal how this feature inscribes an "always on" behavior for users even when they are offline. It concludes by discussing the political significance of this temporality and spatiality in two different senses: the constant acceleration in the pace of life and online surveillance. It draws on David Harvey's concept of space-time compression to discuss the relations between the temporality of Facebook and capitalism, and on Anthony Gidden's time-space distantiation to discuss the power relations of online surveillance.


1971 ◽  
Vol 5 (2) ◽  
pp. 72-82
Author(s):  
Walter F. Weiker

In a previous article I sought to appraise the field of Turkish studies, for the most part among western (predominantly American) scholars (MESA Bulletin, Vol. 3, No. 3, October 15, 1969). To fill out the picture, it is appropriate to also view the state of social research among the rapidly growing body of Turkish teachers and researchers. This article is not, however, a direct parallel to others in the MESA “State of the Art” series, in that it is not basically bibliographical. Such a review would require far more time, space, and knowledge in depth of several other social science disciplines than is currently available to me, because despite the remarks made below about problems of definition, the quantity and technical sophistication of work by Turkish researchers is quite large and is growing rapidly. Furthermore, since most of the research referred to below is in Turkish, the number of persons to whom a bibliographic review might be useful is quite limited. Instead, I think it would be more interesting to MESA members and other American social scientists to examine the characteristics and problems of what is probably one of the most vigorous social science communities in the “developing” countries, with a view (among other things) to helping facilitate increased cooperation between Turkish and American scholars in our common endeavors of advancing the state of knowledge.


1997 ◽  
Vol 26 (524) ◽  
Author(s):  
Søren Christensen ◽  
Laure Petrucci

<p>State Space Analysis is one of the most developed analysis methods for Petri Nets. The main problem of state space analysis is the size of the state spaces. Several ways to reduce it have been proposed but cannot yet handle industrial size systems.</p><p>Large models often consist of a set of modules. Local properties of each module can be checked separately, before checking the validity of the entire system. We want to avoid the construction of a single state space of the entire system.</p><p>When considering transition sharing, the behaviour of the total system can be capture by the state spaces of modules combined with a Synchronisation Graph. To verify that we do not lose information we show how the full state space can be conctructed.</p><p>We show how it is possible to determine usual Petri Nets properites, without unfolding to the ordinary state space.</p>


2011 ◽  
Vol 31 (4) ◽  
pp. 652-662
Author(s):  
Jorge C. dos A. Antonini ◽  
Euzebio M. da Silva ◽  
Nori P. Griebeler ◽  
Edson E. Sano

The objective of this work was to develop and validate a mathematical model to estimate the duration of cotton (Gossypium hirsutum L. r. latifolium hutch) cycle in the State of Goiás, Brazil, by applying the method of growing degree-days (GD), and considering, simultaneously, its time-space variation. The model was developed as a linear combination of elevation, latitude, longitude, and Fourier series of time variation. The model parameters were adjusted by using multiple-linear regression to the observed GD accumulated with air temperature in the range of 15°C to 40°C. The minimum and maximum temperature records used to calculate the GD were obtained from 21 meteorological stations, considering data varying from 8 to 20 years of observation. The coefficient of determination, resulting from the comparison between the estimated and calculated GD along the year was 0.84. Model validation was done by comparing estimated and measured crop cycle in the period from cotton germination to the stage when 90 percent of bolls were opened in commercial crop fields. Comparative results showed that the model performed very well, as indicated by the Pearson correlation coefficient of 0.90 and Willmott agreement index of 0.94, resulting in a performance index of 0.85.


2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Hans Valiancius Ongkowijoyo ◽  
Neno Ruseno

The aim of this research is to optimise the utilization of third runway in Soekarno Hatta International Airport by giving recommendation based on calculation and simulation of runway capacity. The flight schedule data in Soekarno-Hatta International Airport was taken from flightradar24.com for duration of 1- 6 January 2020. The calculation of the runway capacity uses time space analysis method and simulation in BlueSky ATM Simulator. The highest runway capacity of 44 flights per hour is reached when the runway operates as take-off only or landing-only configuration. The simulation is conducted for 3 scenarios: 2 runways configuration, 3 runways configuration and 3 runways configuration with modification. The log data of simulation is analysed using Python programming to know the separation for every pair of flights and ensured that the minima distance due to wake turbulence is fulfilled. The recommendations are runway 07L/25R and 06/24 operates as segregated parallel operation by installing ILS on runway 06/24, extending NP2 and NP3 taxiway for increasing the capacity and reducing the runway incident probability. The results from extending the taxiway are the operation of runway 06/24 will not disturb runway 07L/25R operation, the runway capacity will increase by 60%, and the utilization of third runway will increase by 55%.


Author(s):  
George Kleiner ◽  
Maxim Rybachuk

Este artículo se enfoca en el desarrollo de la teoría económica sistémica basada en el paradigma sistémico formulado por J. Kornai y el enfoque espacio-temporal, cuya combinación abre nuevas perspectivas en el análisis económico de objetos reales. Desde este punto de vista, cada sistema económico tiene dos grupos de características dimensionales ― espaciales y temporales, las cuales determinan sus límites naturales. Por lo tanto, todos los sistemas económicos se pueden dividir en cuatro clases, los sistemas: objeto, ambiente, proceso y proyecto. También se presentan funciones estilizadas de producción de diferentes tipos de sistemas económicos. Se muestra que en el proceso del funcionamiento e intercambio de recursos primarios (básicos), los cuatro tipos de sistemas se conectan en complejos estables ― tétradas. Se considera la cuestión del equilibrio sistémico de la economía y los métodos de su medición y análisis. Finalmente, se ofrecen recomendaciones para la elaboración y aplicación de políticas económicas enfocadas a la sostenibilidad sistémica de la economía.


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