Mathematical Modeling

One was about one documentary research, therefore the sources are articles that deal with Mathematical Modeling in Ensino, presented by means of communication of scientific research or published story of experience and in annals of congresses or scientific magazines. The work had three distinct phases. In the first phase, we proceed the recital and the study from the Mathematical Modeling in education and on learning by means of diverse book readings to base the studied question as base for the solid agreement concerning the subject. In the second phase we proceed the search from articles of authors with significant works on the subject. At this moment thirty articles had been read more than to process the election. In the third stage a comparative picture was constructed enters the works selected with the objective to analyze them.

This picture more allowed a deepened study in function of the comparison between the elencados works. With this it was possible to perceive the knowledge that the authors possess on Mathematical Modeling in education and its use as method of education and research in mathematics in the classroom. 3. Theoretical Referencial To need the accurate moment where the quarrels on mathematical modeling had emerged in Brazil is a complex task. However, considering that mathematical model is defined by Biembengut (2009, p.12) as ' ' a set of symbols and mathematical relations that it looks to translate, of some form, a phenomenon in question or problem of real situation, ' ' it is possible to verify that its use if has revealed since the times most remote through isolated situations and little systemize. The invention of the wheel for the sumrios in year 3000 B.C. is considered one of the first mathematical models produced by the humanity. This manifestation also occurred through the great scientists who had produced celebrities models throughout history, as Eraststenes (276? 196 B.C.) that it created a mathematical model to measure the circumference of the Land.

Neighborhood Politics

The Politics of the Good Neighborhood To deal with workmanship neighbors can demand planning, knowledge of laws and over all, very common-sense. A workmanship can intervene for months and until years with the daily one of the neighborhood. Between the biggest claims they are the excess of noises and poeiras, incessant traffic of vehicles heavy of load and discharge, that pass through had not only confused it local as they finish with the way, and if it was not sufficiently, some problems that intervene directly with the neighbors of the workmanship as, cracks and trincas in existing constructions, fall of materials in roofs and patios and, in more serious cases, collapses of walls. The existence of the neighborhood always must be taken in consideration when if it plans a workmanship, either it of small or great transport. The responsible technician, either it architect or engineer must be the mediator most efficient to minimize such conflicts, since this is inserted in the reality of the construction. In this scene, it is important to stand out that for a good course of the workmanship he practises and it of the good one neighborhood can be reached respecting working hours so that noises proceeding from concrete trucks mixer, cranes and loads and discharge of trucks do not intervene with the calmness of the neighborhood, as well as keeping entorno of the periodically clean workmanship preventing removel of hindrance of the stroll I publish with entulhos and calias; to make the good use of the procedures and norms of security as the use of screens of protection of faades and trays against the fall of residues and materials must be indispensable. Never forgetting, that optimum possible conviviality with the neighborhood reflects positive or negative in the good one practises of the professional who this the front of the enterprise. Larisse Fisch Boizonave Architect and City planner.

Giovanni Cassini

The specter of the crown very shows shining lines that, up to 1940, were not known. Currently and it knows that they are produced by atoms of iron, nickel, neon and calcium highly ionized and not for no strange element, as previously she was thought. The fact of some times ionized in the crown to exist these elements imply that its temperature must be much high, therefore are necessary much energy to extract many electrons of an atom. The crown must have around 1 million of degrees Kelvin. Of the crown it emanates the solar wind, particle a continuous flow emitted of the crown that causes a loss of the mass on the part of the Sun. The Solar wind that reaches the Land is of approximately 7 prtons/cm travelling about 400 km/s, that it is captured by the magnetic field of the Land, forming the cinturo of Van Allen, in the terrestrial magnetosphere. The diameter of the Sun is around 1.390.000 km and its surface arrives 6000 K, in the center reaches 20 million degrees K.

The term Sun is of origin Greek? helium? discovered first in the Sun and one room century was discovered in the Land. The helium if establishes in the Sun to a temperature equivalent 14.000.000 C, emitting violent rays X, if these rays penetrated in the terrestrial atmosphere would cause bad a harmful one to the life of the man. In the distance of the Sun it was discovered in 1673, for Jean Richer (1630-1696) and Giovanni Cassini (1625-1712) that they had determined in the distance of Mars and with this they had esteem the astronomical unit as 140 million km (150 km is the current value), was possible to determine its luminosity, that is the power that it produces. The luminosity of the Sun currently determines in 3,9×10 watts = 3,9×10 ergs/s.