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O Crente Sempre Alerta!
O Crente Sempre Alerta!
Sermão pregado na Igreja Presbiteriana do Primavera em 27 de setembro de 2015
Egmon Pereira
Forced Van Der Pol's Equation
Forced Van Der Pol's Equation
This work is going to analyze the Forced Van Der Pol's Equation which is used to analyze the electric circuit. In 1927, Balthasar Van Der Pol observed the stable oscillation and heard some irregular noise in vacuum tube circuit. He then proposed the Forced Van Der Pol's Equation to analyze the circuit and suggested the concept of limit cycle and Chaos to explain his observation. In this work, We would like to analyze behavior of the model by observing the phase space, time series, bifurcation diagram and power spectrum. Those points in the figures are calculated by Runge-Kutta Method with the aid of MATLAB. For a better understanding, the RLC circuit, which is a electric circuit consisting the a resistor, an inductor and a capacitor, will be used as an example for explaining the properties. Apart from electric circuit, the Forced Van Der Pol's Equation can be applied to dynamic systems in different aspect, such as the artificial heart, economic market and so on. Therefore, we suggest this work to all students since the Forced Van Der Pol's Equation can be applied to many majors, like Mathematics, Physics, Economics, Sociology, Biology, Engineering and so on.
Wallace, Homer
Curso Básico de Doutrinas Bíblicas (Classe de Catecúmenos)
Curso Básico de Doutrinas Bíblicas (Classe de Catecúmenos)
Livro Adaptado da Apostila do Rev. Everton Barcelos Tokashiki para Classes de Novos Membros da Igreja Presbiteriana do Brasil.
Egmon Pereira
Constraints for BETYdb
Constraints for BETYdb
Constraints on the Biofuel Ecophysiological Traits and Yields Database to ensure its logical integrity.
Scott Rohde and David LeBauer
The Entity Registry System. From Concept to Deployment
The Entity Registry System. From Concept to Deployment
The entity registry system (ERS) is a decentralized entity registry that can be used to replace the Web as a platform for publishing linked data when the latter is not available. In developing countries, where off-line is the default mode of operation, centralized linked data solutions fail to address the needs of the communities. Although the features are mostly completed, the system is not yet ready for deployment. This project aims to provide extensive tests and scalability investigations that would make it ready for a real scenario.
Mihai Gramada
The summation of all prime numbers
The summation of all prime numbers
A proof is given that the summation of all prime numbers can be assigned the value of 13/12, as well as values that can be assigned to the summation of all multiples and all odd multiples.
Fernando Franco Félix
Nobel Prize in Physics 2000, how Silicon lost its groove.
Nobel Prize in Physics 2000, how Silicon lost its groove.
In 1957 Herbert Kroemer published a paper entitled “Quasi-Electric and Quasi-Magnetic Fields in Non-Uniform Semiconductors". In it he expressed the utility of non-uniform semiconductor alloys in exploiting their natural atomic potential gradients to imply quasi-electric fields. The breakthrough in Modulation Doped Field Effect Transistors ( or MODFETs) came from the ground-breaking work done by him and Zhores Alferov on Semiconductor hetero-structures that utilize these very fields. I will examine just Herbert’s findings.
Barok Yemane
Primms Algoritm
Primms Algoritm
Labrapport på primms Algortim
Magnus Björk
When Area and Perimeter are “Equal”
When Area and Perimeter are “Equal”
Various geometrical shapes are described, for which the numerical value of the perimeter is the same as that of the area. Cases of one or two parameters are explored.
Rick Powers