26 research outputs found
Systems Approach to the Concept of Environment
No full textAuthor Institution: Department of Zoology and Institute of Ecology, University of GeorgiaA systems theory of environment formulates causal interactions between things, including organisms, and their environments in terms of four system theoretical abstract objects. Creaons receive stimuli and implicitly create input environments. Genons react to received causes and generate potential output environments as effects. A holon represents the combined input-output model of an entity consisting of a creaon and a genon. An environ is a creaon and its corresponding input environment, or a genon and its related output environment. The theory is presented in terms of three propositions that: (1) recognize two distinct environments (input and output) associated with things, (2) establish things and their environments as units (environs) to be taken together, and (3) partition systems into input and output environs associated with intrasystem creaons and genons, respectively
Esquisse d’une réception critique de l’œuvre d’Hervé Guibert en deux moments: 1990/2001
No full textInitially confidential, Hervé Guibert’s work was revealed to the general public with the publication of À l’ami qui ne m’a pas sauvé la vie in 1990. The confession of his illness and the indiscretions about Michel Foucault’s life made the writer a media phenomenon, and there were few literary pages in French and French-speaking weeklies and dailies that did not report on this novel. However, the treatment of the novel in the newspapers goes beyond the simple literary debate and is crossed by moral and ethical considerations. More than ten years later, in 2001, Le Mausolée des amants, the writer’s diary, appeared posthumously. This shorter media period, circumscribed to this single publication, really gives us a purely critical view, detached from the emotional impact of the author’s illness and imminent death. A more distant view, therefore, but also, perhaps, more accurate in that it focuses more on the work of an author than on the author of a work. It is these two periods of reception of Hervé Guibert’s work that the present article wishes to examine, in order to study the way in which critics seize upon subversive texts that destabilise the bourgeois order and the political correctness
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
ABC of Sustainable Development
No full textSustainable development is a field of thought, learning, research and endeavour, which has entrenched itself in the 21st century. This book is certainly very very far from being the be-all and end-all of knowledge about sustainability and sustainable development, as readers will appreciate. This modest effort is something which I hope provides some food for thought…and then hopefully, purposeful action. This book is about 90 pages long, and is split up into 9 chapters, and dwells on the different aspects of sustainable development and the challenges associated with integrating these so that development is truly and holistically sustainable….Chapters begin with Learning Objectives which at once tells the reader what to expect from it, and some Exercises at the end, which one may wish to attempt, en route.As Prof Genon Giuseppe from Turin, Italy, in the Foreword to the book, says, ‘This book is useful to university curricula, aimed at grooming professionals capable of considering all the aspects of sustainable development and of course, can very well be integrated into a host of academic disciplines, as the author has pointed out in one of the chapters.’As Dr Håvard Bergsdal from Trondheim, Norway, says, in his review comments, ‘The book makes for good reading and serves as a useful summary for readers who are new to the topic of sustainability.’</p
A European Bargain: Investing in CEEC Health. CEPS Task Force Reports No. 37, 1 September 2001
No full textFocusing on the process of transition in Central and Eastern Europe, this report looks at health as an issue of enlargement from an economic perspective. The report argues that health is of strategic importance for the success of enlargement and is directly relevant to the future economic development of the candidate countries and to the social and financial sustainability of that development
First observation of the decay Bs0→K*0K*0
No full textThe first observation of the decay B0s→K∗0K∗0 is reported using 35 pb−1 of data collected by LHCb in proton–proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 B0s→(K+π−)(K−π+) events are observed within ±50 MeV/c2 of the B0s mass and 746 MeV/c2 < mKπ < 1046 MeV/c2, mostly coming from a resonant B0s→K∗0K∗0 signal. The branching fraction and the CP-averaged K∗0 longitudinal polarization fraction are measured to be B(B0s→K∗0K∗0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/ fd))×10−5 and fL =0.31±0.12(stat.)±0.04(syst.)
Uma abordagem híbrida para sistemas de apoio à decisão utilizando redes de petri e técnicas de simulação
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.O objetivo do trabalho é propor um Sistema de Apoio à Decisão (SAD), com abordagem híbrida, utilizando Simulação e Redes de Petri como técnicas de modelagem de processos de fabricação e um Sistema Especialista para auxiliar em sua utilização. O SAD proporciona uma interface amigável para o usuário que, a partir da seleção de parâmetros de entrada, obtém como resposta uma série de dados sobre o processo de fabricação, que auxiliam na avaliação de seu desempenho. Para validar a proposta do SAD, alguns cenários particulares ao modelo de uma empresa foram testados, com objetivo de elaborar um conjunto de propostas para aprimorar o desempenho do seu sistema produtivo, avaliar impactos de alterações de parâmetros do modelo e prover melhor compreensão do sistema como um todo para auxiliar no processo de tomada de decisão e documentação da planta produtiva. Algumas alterações significativas foram sugeridas a partir de resultados obtidos na avaliação destes cenários. O sistema mantém um histórico de dados com os parâmetros selecionados e com os resultados obtidos, para que não seja necessário repetir testes com cenários já executados e com objetivo de estabelecer um comparativo entre resultados alcançados. Simulação, que constitui o principal módulo do protótipo, mostrou-se uma ferramenta adequada para construir o modelo do processo e servir de apoio na resolução de questões típicas do tipo what-if. Redes de Petri foram eficientes para validar estruturalmente os cenários do modelo proposto no simulador. O SAD possibilita que gestores, sem conhecimento de técnicas de modelagem, possam manipular dados e interagir com o modelo desenvolvido. O protótipo desenvolvido é genérico para processos de fabricação, sendo sua utilização possível para qualquer planta industrial, desde que os parâmetros do modelo sejam ajustados, com auxílio da interface de entrada de dados do sistema. Os resultados alcançados na utilização do SAD mostraram-se adequados para o modelo da empresa considerada como case de validação do protótipo, pois várias considerações sobre o desempenho do processo foram possíveis através de sua utilização
PARAMETRIC ESTIMATION OF DIFFUSION PROCESSES SAMPLED AT FIRST EXIT TIME
No full textThis paper introduces a family of recursively defined estimators of the parameters of a diffusion process. We use ideas of stochastic algorithms for the construction of the estimators. Asymptotic consistency of these estimators and asymptotic normality of an appropriate normalization are proved. The results are applied to two examples from the financial literature; viz., Cox-Ingersoll-Ross' model and the constant elasticity of variance (CEV) process illustrate the use of the technique proposed herein.Continuous time Markov processes, discrete time sampling, diffusions, interest rate models, stochastic algorithms.
