3,618 research outputs found
A comparative study for the pair-creation contact process using series expansions
A comparative study between two distinct perturbative series expansions for
the pair-creation contact process is presented. In contrast to the ordinary
contact process, whose supercritical series expansions provide accurate
estimates for its critical behavior, the supercritical approach does not work
properly when applied to the pair-creation process. To circumvent this problem
a procedure is introduced in which one-site creation is added to the
pair-creation. An alternative method is the generation of subcritical series
expansions which works even for the case of the pure pair-creation process.
Differently from the supercritical case, the subcritical series yields
estimates that are compatible with numerical simulations
Appropriation in a World Heritage Site: Mozambique Island's visible and invisible complexities
Abstract:
Mozambique Island, situated in the North of Mozambique, was declared a
World Heritage Site by UNESCO in 1991, for its unique architecture, a
testimony to the amalgamation of different cultural and scientific practices
from the 16th century onwards. Generally this research is about a paradox:
Mozambique Island has been recognised as a special place, and yet it is in a
state of disrepair and buildings are being rebuilt and reconstructed in ways
that are not consistent with the designation. Situated within the field of Human
Geography, my research question Why is the World Heritage of Mozambique
Island in its present state is answered through an exploration of the concept of
appropriation and the importance of recognising the invisible and visible
complexities of a locality. I argue that the complexities of Mozambique Island
(viewed from differing scales) determine the perception of the islanders have
of how World Heritage could potentially benefit them, which in turn, directly
informs conservation, maintenance and management strategies (at
community, city council, regional and national levels). The appropriation of
identity and space only happens when the individual or group concerned think
that they would benefit at some level from it. In the case of Mozambique
Island, most subjects interviewed do not know what World Heritage is, how
they could benefit from potential tourism associated with it and therefore why
they should be putting extra effort into conserving it. Through a conversation
between issues of World Heritage, identity, space, ownership, tourism and
scale, I propose that in Mozambique Island there is a case of nonappropriation
of its World Heritage due to its complexities, the main being:
severe poverty, lack of education, bad governance, a culture of dependency
and poor support from the national and regional government and UNESCO
Resposta comparada do sorgo granífero (Sorghum bicolor (L.) Moench) e do milho (Zea mays L.) a adubação nitrogenada, fosfatada e potássica: I. Areia quartzosa distrófica
The comparative response of three sorghum (E-57, TEY 101 and C- 102) and of three corn cultivars (HMD-7974, Centralmex and Piranão) to N, P and K applications was studied in a soil from Anhembi, SP, classifield as Distrophic quartz sand (AQd) was studied. Leaf analyses were made to assess the nutritional status of the two crops. Main conclusions were the following. 1. Sorghum yieldel more than corn; 2. Both sorghum and corn varieties showed different capacities to absorb N, P and K from the soil and to fertilizer application; 3. There was no response to K2O fertilization; 4. Only Piranão increased yield when suplemented with a mixture of micronutrientes; 5. Direct relationships between rates of N and P2O5 and yield and leaf content were found; 6. Direct relationships between rates of N and P2O5 and yield and leaf content were found; 7. The following leaf levels were considered to be adequate, respectively for sorghum and corn: N - 2,00 - 2,25%, 3,25 - 3,50%; P - 0,30 - 0,40, 0,45 - 0,50; K -2,00 - 2,50, 2,20 - 2,40%; Ca - 0,20 - 0,40, 0,44- 0,72% Mg - 0,25 - 0,40, 0,34 - 0,60%; S - 0,50 - 0,70, 0,72 -0,80; Cu - 7 - 10, 11 - 15%; Fe - 84 - 170, 98 - 125%; Mn - 58 - 72, 66 - 85%; Zn - 10 - 14, 18 - 22; critical levels, however, do very depending upon cultivar.Em urn solo classificado como Areia Quartzosa Distrófica (AQd) de Anhembi, SP, foi estudada a resposta de três cultivares de sorgo granífero (E-57, TEY-101 e C-102) e de milho (HMD-7974, Centralmex e Piranão) à adubação nitrogenada, fosfatada e potássica e à adição de uma mistura contendo micronutrientes. Durante o de senvolvimento foram colhidas amostras de folhas para análise mineral. A análise dos dados permitiu tirar as seguintes conclusões principais: 1. as produções do sorgo foram maiores que as obtidas com o milho, quer se considerem as médias de todos os tratamentos ou a colheita correspondente ã dose maior de adubo (150 kg de N, 200 de P(2)0(5) e 150 kg de K(2)0 por ha); 2. as variedades tanto de sorgo quan to de milho mostraram capacidades diferentes para absorver N e P do solo e para responder à adubação empregada ; 3. não houve resposta à adubação potássica; 4. somente a cv. Piranão respondeu à adição de micronutrientes; 5. foram encontradas relações diretas entre dose de N e P2O5 aplicada, colheita e teor do elemento correspondente, o que permitiu estabelecer níveis críticos fisiológicos para a avaliação do estado nutricional; 6. estabeleceram-se os teores foliares dos macronutrientes secundários (Ca, Mg e S) e dos micronutrientes catiônicos que indicam nutrição mineraladequada
Total-dose radiation effects data for semiconductor devices. 1985 supplement. Volume 2, part A
Steady-state, total-dose radiation test data, are provided in graphic format for use by electronic designers and other personnel using semiconductor devices in a radiation environment. The data were generated by JPL for various NASA space programs. This volume provides data on integrated circuits. The data are presented in graphic, tabular, and/or narrative format, depending on the complexity of the integrated circuit. Most tests were done using the JPL or Boeing electron accelerator (Dynamitron) which provides a steady-state 2.5 MeV electron beam. However, some radiation exposures were made with a Cobalt-60 gamma ray source, the results of which should be regarded as only an approximate measure of the radiation damage that would be incurred by an equivalent electron dose
Total-dose radiation effects data for semiconductor devices: 1985 supplement, volume 1
Steady-state, total-dose radiation test data are provided, in graphic format, for use by electronic designers and other personnel using semiconductor devices in a radiation environment. The data were generated by JPL for various NASA space programs. The document is in two volumes: Volume 1 provides data on diodes, bipolar transistors, field effect transistors, and miscellaneous semiconductor types, and Volume 2 provides total-dose radiation test data on integrated circuits. Volume 1 of this 1985 Supplement contains new total-dose radiation test data generated since the August 1, 1981 release date of the original Volume 1. Publication of Volume 2 of the 1985 Supplement will follow that of Volume 1 by approximately three months
What is plagiarism after all?
Univ Fed Sao Paulo UNIFESP, EPM, Dept Ophthalmol & Visual Sci, Sao Paulo, SP, BrazilHosp Olhos Sorocaba BOS, Sorocaba, SP, BrazilUniv Fed Sao Paulo UNIFESP, EPM, Dept Ophthalmol & Visual Sci, Sao Paulo, SP, BrazilWeb of Scienc
A supercritical series analysis for the generalized contact process with diffusion
We study a model that generalizes the CP with diffusion. An additional
transition is included in the model so that at a particular point of its phase
diagram a crossover from the directed percolation to the compact directed
percolation class will happen. We are particularly interested in the effect of
diffusion on the properties of the crossover between the universality classes.
To address this point, we develop a supercritical series expansion for the
ultimate survival probability and analyse this series using d-log Pad\'e and
partial differential approximants. We also obtain approximate solutions in the
one- and two-site dynamical mean-field approximations. We find evidences that,
at variance to what happens in mean-field approximations, the crossover
exponent remains close to even for quite high diffusion rates, and
therefore the critical line in the neighborhood of the multicritical point
apparently does not reproduce the mean-field result (which leads to )
as the diffusion rate grows without bound
Extreme Events Decision Making in Transport Networks: A Holistic Approach Using Emergency Scenarios and Decision Making Theory
This paper proposes a novel method to analyse decision-making during extreme
events. The method is based on Decision-making Theory and aims at understanding how
emergency managers make decisions during disasters. A data collection framework and an
analysis method were conceptualized to capture participant’s behaviour, perception and
understanding throughout a game-board simulation exercise, which emulates an earthquake
disaster scenario affecting transport systems. The method evaluates the participant’s actions in
order to identify decision-making patterns, strengths and weaknesses. A set of case studies has
shown two typical patterns, namely: a) Support immediate rescue; b) Support lifelines
recovery. Good decision-making practices regard to objective-oriented decision making,
understanding of conflicting priorities and appropriate resource management. Weaknesses are
associated with comprehending relationships between community/environment and projecting
future scenarios. Overall, the case study’s results demonstrate the efficiency and robustness of
the proposed method to analyse decision making during disasters
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