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First Sound Meter

50Th anniversary of the first sound meter in the world in 2010 we celebrate the 50 anniversary of the model 2203, the father of all sound level meters. The sound meter is 50 years old in 2010 we celebrate the 50 anniversary of the model 2203, the father of all sound level meters. It was the first sound meter portable precision-based transistors in the world. It was manufactured for 21 years and had a few sales record of 17,300 units. If add their improved versions, models 2204 (Impulsiva time constant) and 2209 (peak detector), came to a total of 32,700 units.

This is the story of the first laptop in the world sound level meter, as was recorded in files and as they were told us who lived it. For half a century, product presentations were no more than a humildecomunicado on the news section of the factory on the last page of the Revistatecnica of Bruel & Kjar. Number 3 in 1960 included the Bulletin which is reproduced above. Don SLM our expert design of sound level meters for decades, Peter Hedegaard, gives us this explanation of how evolved the portable sound meter: the model 2203 was the first portable sound meter of Bruel & Kjar. I am not who to say who was the father of this special design, but it is likely that both P.V.

Bruel as GunnarRasmussen had something to see, but the final design is attributed to Kay Moller Petersen. What was special was that design the front in a cone shape, which made it possible to place the microphone in the housing without its acoustics would be affected significantly. Put another way: you could measure, hold and manage the sound level meter with one hand.A reissue of number 183, October 1970 Mobilia appeared as follows (translated from Danish): Bruel & Kjar was on the verge of developing a small manual sound level meter for use in factories, the traffic on the street and in other locations in which need to point to targets Mobile.

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Technology of Dental Implantation

Dental Implants – a new quality of life! Since ancient times, known to man's desire to replace lost teeth with various materials of animal, human and mineral origin. Does the ancient Civilization secret knowledge to enable them to carry out a successful operation? On the territory of Honduras, was found a fragment of mandible Inca (dated VI. BC), in place of 3-tooth implants are installed from the shells of sea mussels. Shantambre (France), found a skull woman who lived in I. BC, with a metal implant in the maxilla. Unfortunately, it is difficult to judge the success of these operations, as archaeological finds cause more problems for the majority of which has no Responses.

It is known that in the Middle Ages, and in modern times almost all the installation of implants fails – there is festering wound and graft rejection. And only with the introduction of Lord Joseph Lister concept of 'antisepsis' hope for the successful outcome of the operation. The first international experience tooth implantation was obtained only in 1965, thanks to the efforts of Professor Ingvar Branemarka. That Bronemark, first to establish the 4-th implant volunteer Gosta Larsen. Technology used Ingvar Bronemarkom, were initially rejected by the majority of maxillofacial surgeons.

Nevertheless, the first patient lived implantologist a full life, he implants served him in 1941 …. until his death. 1965 can be considered – a starting point for the development of a new branch of dentistry – implantology. What is an implant? Implant – is similar to the structure of the screw Titanium, which is implanted into the bone and acts as a support for the abutment (Abutment – a link between dental implants and attached it to dentures or other construction).

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Constitution

As most you know, the bicycle is one of the most used and most traded of all transport means. The great dream of every child is to have a bicycle. It helps us to play, learn about other places and develop our motor skills. Therefore, this transport is relevant in our lives, gives us comfort, health, and environmental well-being. This is how the State tries to encourage the use of this. And this is how Deputy articles 63 and 65 of the political Constitution of the Republic. 3Rd who are caring for the health and safety of persons, equality and democracy among the citizens, promoting and safeguarding the environment, between the functions of the State and that, in this sense, those means of human-powered transport, like the bicycle, which show greater efficiency in the use of road capacity and protection of the environment and which promote a greater civility and cooperation between users of railway networks They must be building and promotion by the State; 4Th which is highly suitable for the health and well-being of people and the planet, which the population migrate growing form of motorized vehicles, particularly of private, human as the bicycle and walk-powered media to solve an important part of their daily travel; 5th, that said, the movement of bicycles is being an alternative to the circulation of automobilesTherefore, should be stimulated by the State 8th that the bicycle is a means of economical transportation that allows users to save money on transportation, greater mobility, access more equitable and expeditious to public space and the assets of the city, produces integration, facilitates contact and communication between people, becoming an instrument that contributes to social cohesion and citizen security. Article 8. Definitions of some Conceptos1. Bicycle: is a device exclusively driven by human force, which consists of two or more aligned wheels, where a person can sit or mount on a seat.

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January Market

On the day of Friday, the dollar had closed in slates to $3.47 on the tip selling retailer. The bet that makes the market, is the continuity of the depreciation of the Argentine peso. In this sense, Rofex market futures are operated to $3.50 by year’s end and $3.55 for late January. It is important to note that in this market he intervenes with its operative the BCRA, implying that without its intervention, the price of the U.S. currency futures might be higher than that observed. In fact, in New York, for NDF contracts, operations embodied in the day on Friday was agreed to $3.85 to 30 days. This movement to the rise of the dollar in recent weeks, when it made only a couple of months, the BCRA strove to twist down to the type of change, creates some uncertainty about what is happening in the Argentine economy. And what is happening there is a not too complex explanation and that is linked to the change of both domestic and international economic scenario.

The sharp fall in the prices of agricultural commodities (soya price spent in a short time of a) maximum level of USD 600 ton to the current 300 USD), has represented a serious blow to the public accounts and also to the Argentine countryside. Both the public sector and the Argentine countryside are now in a worse situation than in full conflict between the two even in your scenario more negative for both (mobile retentions for the field, and fixed deductions in the case of the Government).