Augmented reality
Augmented reality (RA) is the term used to define the vision of a physical environment of the real world through a technological device. That is, tangible physical elements are combined with virtual elements, thus achieving to create an augmented reality in real time.
It consists of a set of devices that add virtual information to the existing physical information, that is, add a virtual synthetic part to the real one. The augmented reality is different from the virtual reality because on the material reality "of the physical world" it assembles a visual reality generated by technology, in which the user perceives a mixture of the two realities. On the other hand, in virtual reality, the user isolates himself from the material reality of the physical world in order to "submerge" in a totally virtual setting or environment.
With the help of technology (for example, adding computer vision and object recognition) information about the real world around the user becomes interactive and digital. Artificial information about the environment and objects can be stored and retrieved as a layer of information at the top of the real world view.
Augmented reality research explores the application of computer-generated images in real time to video footage as a way to expand the real world. The research includes the use of screens placed on the head, a virtual monitor placed on the retina to improve visualization and construction of controlled environments from sensors and actuators.
Recently, the term augmented reality has spread by the growing interest of the general public.
Cooperative learning
"Stronger together." This expression could summarize in a simple way what cooperative learning is all about, a methodology that teachers use to group students together and, thus, impact learning in a positive way.
The proponents of this model theorize that working in a group improves the attention, involvement and acquisition of knowledge by students. The final goal is always common and will be achieved if each of the members successfully perform their tasks. The main characteristic is that it is structured based on the formation of groups of 3-6 people, where each member has a specific role and to reach the objectives it is necessary to interact and work in a coordinated manner.
In cooperative learning, the final goal is always common and will be achieved if each of the members successfully performs their tasks. On the other hand, in individual learning the student focuses on achieving their objectives without having to depend on the rest of their classmates.
International Code of Signals
The International Code of Signals is used in maritime navigation to transmit messages, either between two or more ships, or between a ship and land or seaport. For this purpose there are flags of different shapes and colors, each of which represents a letter of the international alphabet, as well as numbers f 0 to 9.
When a ship needs to transmit a message consisting of several words or numbers, it hoists in the bow mast flags representing the message's letters and numbers, aligned from top to bottom. If the message is longer, the operation will be repeated with new flags.