e-Learning
e-Learning, also known as "online learning", mainly refers to the digital tools, through a wired or wireless network access to digital materials for online or offline learning in order to enhance the effectiveness of learning activities.
e-Learning is the combination of the greatest characteristics of communications, computer and audio-visual multi-media technology at the same time break the constraints of time, from traditional classroom education and training patterns, transforming into a learning to use the Internet to provide users anytime, anywhere learning environment.
In other words, under the framework of e-Learning, learning and teaching by the parties may from time to no longer be limited to traditional face to face modes of teaching. Basically, the learner Ke Yi habits and status of self-adjustment of learning progress.
Unit or organization for teaching purposes, e-Learning also reduces the cost of classroom equipment and other entities, expenses, according to statistics, online learning organization can save 15% ~ 50% of training costs.
e-Learning concept of the areas covered by the broad masses can be divided into learners and educators, and digital educational materials and online learning management system (LMS; Learning Management System)-based. Among them, several materials can be Live situation (live recording), streaming audio and video animation and simulation, etc. present. As for the online learning management system is the core of e-Learning, is responsible for providing a virtual learning environment for online teaching, discussion, learning activities, assessment, learning records, and progress tracking functions.
e-Learning is not only technically complex division of labor is also very careful to compete for the industry from a number of e-learning tools (carrier and aids) research and development, digital learning network environment and deployment of digital teaching materials development, and the design of digital learning activities, etc. category.
E-R Model Entity - Relationship Model
The so-called entities, that is, the different nature of the business environment in the individual (object), while the relationship (relationship) is between the individual and the individual correlation. Each entity must be included among a number of attributes (attribute), so individual, relationship, property constitutes a basic ER Model where three elements.
ER Model in fact, the entity concept and the concept of object-oriented objects in the same vein, simply put, both as to the real world can see the real object as a starting point, such as: people, students, classrooms, staff, etc., and the association between objects. Design of ER Model and also the most difficult part of the most creative is to determine which entities should be used, what kind of relationship to create a business model, so an ER Model to the design of the enterprise must take into account the depth of understanding of organizational processes and technical extensive experience in surface analysis.
e-zine Electronic Magazine
The magazine's contents on the Web (WEB PAGE) on the publication's website (WEB SITE).
E1
E1 signal is used in the communication transmission unit, which is equivalent to 2.048 Mbps, which is Europe's specifications, you can send 30 phone signal at the same time, U.S. regulations known as the T1, can send 24 phone signal.
E1 signals typically use 120-ohm twisted pair or 75 ohm coaxial cable as the transmission medium, as E1 over T1 has a higher transfer rate, so the same distance into the need for more regenerator (repeater) Equipment to strengthen the signal.
4 E1 is equivalent to E2, so E2 is equal to about 8.448 Mbps; 4 E2 is equivalent to E3, so E3 is equal to 34.368 Mbps; 4 E3 is equal to an E4, the equivalent of 139.264 Mbps; 4 E4 is equivalent to E5, so some E5 565.148 Mbps. |
