https://padlet.com/yudelsimusic/62t13b27vdc6 Ancient and modern en-us 2017-09-30 14:42:53 UTC 2025-10-25 11:07:03 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Bigthunderstorm.png yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679988 First generation of cellular telephony

The first generation of the Motorola DynaTAC 8000X comes from the first phone of this technology in the world market known as the "brick", until the end of the 80s. These devices consisted of an analog technology for the exclusive use of voice conversations. The predominant technology in this period is the AMPS (Advanced Mobiles Phone System).]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679988 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679989 One of the great evolutions of the cars are the use of less heavy metals to add more speed and the use of new materials for each part of the car like tires to be more resistant.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679989 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679990 Are the material means and structural organizations that serve to apply the recent scientific discoveries.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679990 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679992 There is no doubt that cell phone has become in recent years one of the technologies most commonly used a newspaper by millions of people around the world. Almost thirty years of constant evolution in personal mobile communications the lion became a fundamental element in the daily development of any activity undertaken by the individual.
Together with the Internet, cell phones have become one of the essential elements for the social life of anyone, and that is precisely because these fabulous devices bring users of a great variety of benefits, the new models of terminals, in the which include additional features to offer the most complete service to the consumer.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679992 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679993 were one of the most remarkable and famous advances with which came more details and funsiones and another difference is the great reduction of size and more smoke of power.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679993 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679994 The old ones are made 20 years ago or more. The current ones have 6 months or less manufactured.
Some were totally mechanical. The current ones are totally electronic.
"Roll" are better than digital ones.
The old "shutter lag" was imperceptible.
Some old ones did not need batteries or batterías to work, the current toadas need battery / battery to work.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679994 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679995 Primitive materials were used.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679995 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679996 Set of knowledge and techniques that, applied in a logical and orderly way, can be human to modify their material or virtual environment to meet their needs.]]> 2017-09-30 14:42:53 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192679996 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192696649 It appears in the 90's, is digital and already have additional benefits to voice, such as the possibility of sending messages (SMS) but without achieving the current boom, its battery has a longer duration and autonomy, are (GSM), IS-136, CDMA (Code Division Multiple Access) and PDC (Personal Digital Communication) are the most prevalent technologies, the latter used in Japan.]]> 2017-09-30 18:19:35 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192696649 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192696882 It is characterized by merging all the previous technologies with the new technologies incorporated in the cell phones. The devices have a chip, SIM card where all the information is entered.
3G technology is born from the need to increase the capacity of data transmission in order to offer services such as Internet connection from the mobile phone, video conferencing, television and file downloads. At this moment the technological development already makes possible a totally new system: UMTS (Universal Mobile Telecommunications System).
UMTS uses CDMA technology, which makes it reach very high speeds (from 144 Kbps to 7.2 Mbps, depending on the terrain conditions).]]> 2017-09-30 18:23:02 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192696882 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697253 In a telephone system, the transmission is based on the passage, through a circuit, of a current flow whose intensity variations are marked by the resistance variations of said circuit. The apparatus responsible for modifying the resistance of the latter, and hence the current, is the microphone.

The microphone incorporates a device of cylindrical form, with small grains of coal - coal alters its degree of conductivity of the electricity according to the pressure factor]]> 2017-09-30 18:27:40 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697253 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697814 The Egyptians invented and used many simple machines, such as the inclined plane and the lever, to aid in the constructions. The Egyptian paper, made of papyrus and pottery were exported by the Mediterranean basin. However the wheel would not appear until foreign invaders brought with them carts. They also played an important role in the development of maritime navigation or maritime technology, Mediterranean, both in boats and lighthouses.]]> 2017-09-30 18:35:00 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697814 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697868 The Greeks invented many technologies and improved existing ones, especially during the Hellenistic period. Heron of Alexandria invented a basic steam engine and showed that he had knowledge of mechanical and pneumatic systems. Archimedes invented many machines. The Greeks were unique in the preindustrial era for their ability to combine scientific research with the development of new technologies. An example is the Archimedes screw, which was first conceived mathematically and later was built. They also invented the ballista and primitive analog computers, like the mechanism of Antiquitera]]> 2017-09-30 18:36:13 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192697868 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192698088 Roman engineers were the first to build monumental arches, amphitheaters, aqueducts, public baths, stone bridges and crypts. Some notable Roman inventions were the codex, blown glass and concrete. As Rome is located on a volcanic peninsula whose sand contains crystalline grains, Roman concrete was especially resistant to weather. Some of its buildings have remained standing for more than two thousand years. The Romans developed sophisticated agriculture, improved ironwork and masonry technology, improved road construction (methods that were not obsolete until the development of macadam in the 19th century), military engineering, civil engineering, spinning and weaving with many different machines such as combine harvester, which helped to increase the productivity of many sectors of the Roman economy.]]> 2017-09-30 18:39:56 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192698088 yudelsimusic https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192698333 They create electronic console to stimulate the dogs.
An interactive game delivers your food to the dog as a reward, if you manage to press, with your paw or nose, the luminous buttons.

Mexican creates software to detect people in disaster areas
This software, created in 2013 in New Zealand and for which nominated Reyes Gomezesta, would allow the authorities to know the number of people who were in a building before, during and after the collapse of this during the quake.

Smart home appliances that do the shopping alone.
They were born with the firm intention of making us day-to-day more bearable but in the future, appliances will be even more faithful to their own philosophy - fortunately. The latest prototypes that we have seen have left us frozen and never better because the first of them is a refrigerator signed by Samsung and trained to become selfish and send them on the mobile. It integrates a touch screen of 21 inches in which also it notifies you of everything that you need. Insuperable? Not because Whirpool go a step further with their latest prototypes of dishwasher, washing machine and dryer: they are able to automatically buy the tablets, detergent or fabric softener. That is, they know the products they need and with your approval, they are able to buy them via Amazon.]]> 2017-09-30 18:43:41 UTC https://padlet.com/yudelsimusic/62t13b27vdc6/wish/192698333