101,730 research outputs found
Charles Simic's uses of his-story
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e ExpressãoEssa dissertação investiga como os eventos históricos são recriados na poesia de Charles Simic. O propósito dessa investigação é contribuir para uma leitura dos trabalhos de Simic, buscando as inter-relações do pessoal com o histórico, mostrando assim, como a poesia do autor, relacionada principalmente à Segunda Guerra Mundial, é válida como instrumento histórico. Durante este estudo, são analisado diferentes gêneros usados por Simic, como poemas, poemas em prosa, ensaios, artigos e entrevistas. A base teórica pressupõe a leitura e análise de teóricos influentes, como James Longenbach, Friedrich Nietzsche e Hayden Whit
SimiC enables the inference of complex gene regulatory dynamics across cell phenotypes
No full textSingle-cell RNA-Sequencing has the potential to provide deep biological insights by revealing complex regulatory interactions across diverse cell phenotypes at single-cell resolution. However, current single-cell gene regulatory network inference methods produce a single regulatory network per input dataset, limiting their capability to uncover complex regulatory relationships across related cell phenotypes. We present SimiC, a single-cell gene regulatory inference framework that overcomes this limitation by jointly inferring distinct, but related, gene regulatory dynamics per phenotype. We show that SimiC uncovers key regulatory dynamics missed by previously proposed methods across a range of systems, both model and non-model alike. In particular, SimiC was able to uncover CAR T cell dynamics after tumor recognition and key regulatory patterns on a regenerating liver, and was able to implicate glial cells in the generation of distinct behavioral states in honeybees. SimiC hence establishes a new approach to quantitating regulatory architectures between distinct cellular phenotypes, with far-reaching implications for systems biology
Mixture of Gases with Multi-Temperature: Maxwellian Iteration
No full textIn this paper a hyperbolic model is proposed for mixtures of gases which are neither viscous, nor heat-conducting (Eulerian fluids). It is built upon assumption that each constituent obeys it's own temperature. Restrictions to the structure of the model come out from basic principles of extended thermodynamics, i.e.
Galilean invariance of balance laws and entropy inequality. Hierarchy of hyperbolic subsystems is recognized, with a single-temperature model as principal subsystem and classical Euler's equations as equilibrium subsystem. Finally, in order to relate this model to classical thermodynamics, a Maxwellian iteration is performed in the case of binary mixture, giving rise to a relation between the diference of non-equilibrium temperatures of constituents and classical fields
Mixture of Gases with Multi-temperature: Identification of a macroscopic average temperature
No full textIn this paper we present the model of a mixture of gases in which each constituent
has it's own temperature. We review some recent results, in particular concerning
the global existence of smooth solutions. Than we deduce a solution of the di®er-
ential system under the assumption that the ̄elds depend only on time. In this
way, we are able to identify a possible natural macroscopic average temperature
On the Hyperbolic System of a Mixture of Eulerian Fluids: A Comparison Between Single- and Multi-Temperature Models
No full textThe first rational model of homogeneous mixtures of fluids was proposed by Truesdell in the context of
rational thermodynamics. Afterwards, two different theories were developed: one with a single-temperature
(ST) field of the mixture and the other one with several temperatures. The two systems are from
the mathematical point of view completely different and the relationship between their solutions was
not clarified.
In this paper, the hyperbolic multi-temperature (MT) system of a mixture of Eulerian fluids will be
explained and it will be shown that the corresponding single-temperature differential system is a principal
subsystem of the MT one. As a consequence, the subcharacteristic conditions for characteristic speeds
hold and this gives an upper-bound esteem for pulse speeds in an ST model. Global behaviour of smooth
solutions for large time for both systems will also be discussed through the application of the Shizuta–
Kawashima condition. Finally, as an application, the particular case of a binary mixture is considered
Average temperature and Maxwellian iteration in multitemperature mixtures of fluids
No full textThis paper treats the nonequilibrium processes in mixtures of fluids under the assumption that each constituent
is characterized by its own velocity and temperature field. First we discuss the concept of the average
temperature of mixture based upon considerations that the internal energy of the mixture is the same as in the
case of a single-temperature mixture. As a consequence, it is shown that the entropy of the mixture reaches a
local maximum in equilibrium. An illustrative example of homogeneous mixtures is given to support the
theoretical considerations. Through the procedure of Maxwellian iteration a new constitutive equation for
nonequilibrium temperatures of constituents is obtained in a classical limit, together with the Fick’s law for the
diffusion flux. These results obtained for n-species are in perfect agreement with a recent classical approach of
thermodynamics of irreversible processes in multitemperature case due to Gouin and Ruggeri and generalize
our previous papers concerning the case of a binary mixture
SHOCK STRUCTURE IN A HYPERBOLIC MODEL OF BINARY MIXTURE OF NON-REACTING GASES
No full textIn this paper the problem of shock structure in binary gas mixture is studied with assumption
that temperatures of the constituents may not be equal. Mathematical model is developed within
the context of extended thermodynamics leading to a hyperbolic system of quasi-linear partial
differential equations. Classical Euler's system of gas dynamics equations appears to be an
equilibrium subsystem of the mixture system. Due to the presence of dissipative terms
discontinuous shock-wave solution is smoothed out to a continuous shock structure (profile)
connecting two equilibrium states. By assuming the shock profile in the form of plane traveling
wave a set of ordinary differential equations is derived from the complete set of balance laws.
Numerical study revealed that there exists a smooth solution to the problem for shock speeds
greater than the highest characteristic speed of the equilibrium subsystem. This solution confirms
that mass difference is the main cause for the difference of temperatures of the constituents.
Moreover, nonlinear form of source terms, obtained through the use of entropy principle, appear
to be crucial for the problem in question since the intermediate states of the system are driven far
from equilibrium
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
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