Tag: multinivel

In the present article I will transmit a series of slight knowledge, of very basic form, regarding the canine perception of that scent, that emanated by the victim, supposes an essential stimulus so that the rescue dog takes to effect the location and signaling of the same. The canine sense of smell is potentially an extraordinary instrument to be able to locate the victims buried in a wreck, but we have to have present that diverse causes, more or less direct, can decrease or to even annul their effectiveness in the operations search. An inadequate level of motivation, weak concentration, a deficient formation, stress, the environmental fatigue in the dog, factors, the lack of skill of the guide or the Commander of the Unit is even some of these causes. Stimulating the specific ones of the olfactory cells are the odorous substances that in gaseous form are introduced in the nasal cavity during the breathing. In this question I consider important to emphasize that although the simple normal respiratory movements put in contact to the olfactory mucosa with part of the inspired air, when the dog realises the voluntary act to smell, remarkably increases the communication of the odorous substances with mucous happiness, increasing consequently its power olfactory of considerable form. So that the dog perceives a scent emitted by a substance is necessary that an suitable volume arrives at its area olfatoria from air with a sufficient concentration from odorous particles, being to him easier to perceive at the most volatile substance and soluble in water it is.

Inside the nasal graves of the dog, is a covered membrane of olfactory cells, whose configuration presents/displays a set of you fold. The number of olfactory cells in this membrane oscillates between 150 and 300 million following the race, whereas in the man exist around 5 million. These olfactory cells that are located in the nasal mucosa and order to pick up the odorous stimuli, are provided nervous cells of a peripheral prolongation that finishes in cilia or filaments, which they arrive until the surface of the nasal mucosa and are places setting by a thin liquid layer secreted by the calls glands of Bowman.

The third industrial revolution will be based on renewable energies and Internet. In her the developed nations are due to embark to surpass the dependency of petroleum. Thus it assures the American economist Jeremy Rifkin, one of the expert majors in political energetics. After an agricultural and hydrologic revolution and the beginning of the writing went to a mechanical revolution carried out by the press, the steam engine and the telephone and impelled by fossil fuels. Now, according to Rifkin, the moment has arrived for giving a new evolutionary jump based on the renewable energies and the instantaneous communications. We faced at the end of the economy of carbon, petroleum, the gas and the uranium, that turns out to be untenable and polluting. These fossil energies are of elite, usually are centralized, need enormous capitals for their process and commercialization, besides strong military investments to guarantee their security. Many conflicts by them have occurred and have generated a great one imbalance.

The nuclear power cannot be a long term solution, by economic and environmental reasons. The 408 nuclear reactors that there are in the world, are obsolete in their majority, and would make lack invest 2. 000 million dollars in each. So that the nuclear power had protagonism would be necessary to construct to two power stations every 30 days during next the 60 years, according to the economist. The country that more nuclear power produces, France, needs 40% its water reserves to cool the nuclear power stations. It does not seem viable thinking about the droughts that will come. In addition, there will be uranium Y deficit, although it would be possible to be reconverted plutonium, his transport would generate a problem of international security by the terrorism. Without forgetting the radioactive waste for which not yet there is a suitable solution. Nevertheless, there is renewable energy by all the planet.