And her friends safely shall accept the invitation as soon as you tell them the number of boys who will attend the same. Always use the technique say to each one of the people that you invite, that one of the attendees is eager to see it. Other situations: what would you do if after accepting the invitation of a friend, who is not your favorite, receives a phone call from him who really likes, to invite them to eat? Ethics tells him that he must keep his previous commitment. However, as the phone allows us to make use of some tactics that are personally impossible to perform, we can arrange the situation where two calls have occurred almost simultaneously. Communicate quickly with his friend (who called it first) and explain to him, with very convincing words, has emerged an unexpected and that you cannot leave with him that night, but that they can do it the next day. Then? You already have the clean way to exit with your favorite friend.

Know how to cut to the inopportune: there are people who use the phone only to kill time. Do not confuse is this with the friend who called because you are depressed and need someone who helps you feel better. The person who has no limit when he speaks by telephone, must be treated firmly, but courteously. A method that you can use to escape from this torment, and that always gives a result, is to simply tell you that you have many things to do. If the tireless charlatan ignores his apology, repeat it again, and promise you will continue the conversation at the next opportunity to be seen personally. This trick invariably gives good results.

The way in which you farewell is as important as the greeting. A later said in almost impersonal way, let another person confused as to whether you were interested in the conversation. The best way to say goodbye is giving thanks for the call and saying to your partner that you would like to return it to call.

Final introduction of the 1980s emerged a variety of manufacturing technologies known as Rapid Prototyping and Manufacturing (RP & M). These new technologies can generate physical objects from a computer model created in a CAD system. All these technologies have in common an important fact, the generated object is obtained by adding material, not deleting. This is because they are based on the techniques of manufacturing layered (Layer Manufacturing Technologies). The ability of visualization of three-dimensional designs, the decrease in the time required to produce prototypes, the reduction of costs associated with the Elimination of redesigns in the early stages of design, geometric freedom, parts are some of the advantages offered by these processes. However one of the disadvantages posed by materials of sintered is that the material in powder not sintered during the process can be reused only a limited number of cycles, since during the phase of warming in the camera of sintered, said material it loses properties and is discarded. The material remains at a temperature near the melting for more or less long depending on the size of the piece to build. This makes some fractions of the polymer are decomposing and some additives will degrade.

This material is mixed with Virgin material in a certain proportion however after about 15-20 cycles is discarded, with the consequent economic cost that this entails, and the environmental impact that generates. In order to obtain a more efficient use of the material in order to minimize their consumption and optimize the frequency of replenishment of the Virgin material has been developed a systematic method for determining loss of properties and its potential for reuse. This methodology is based on the determination of the MFI of the material not sintered during the process of SLS. Previous studies claim that the MFI is quick and simple method for measuring the pace of degradation of dust due to the SLS process.