3D printing
3D printing or additive manufacturing (AM) refers to any of the various processes for printing a three-dimensional object. Primarily additive processes are used, in which successive layers of material are laid down under computer control. These objects can be of almost any shape or geometry, and are produced from a 3D model or other electronic data source.
Basic principles
If the
print ad in a magazine, they sought to base their prices on the number of people who would see an ad-what in the trade is called ”exposure- based cost-per-thousand pricing .” (The shorthand is CPM, with M being the Roman numeral 1,000.) As with conventional broadcast and print advertising, this approach measures only the amount of advertising delivered, usually expressed in terms of :exposure
Appeals to people who has common interests
Advertisers reach to specific market by small amount of budget
The quality of magazines are higher than
any other print media
Long time warrant to exposure the ad to people
consumers
Contact
situation
Newspaper
Pros - Clarified a social classes and regions - Awareness active repetition, they can use the ad over and over
Con
4. Amenity
For comfortable and convenient circumstances, the hotel provides other facilities such as enough parking space, conference room, upgraded room, free using of computers, printing machine, wireless internet, water purifier, washing machine and smoking room.
5. price
The price is Mid-scale and includes limited F&B service. Depending on the quality, the more service is, the highe
1. Listening Comprehension
1~3) Listen to the following and answer the question.
Pre-history
Prior to the release of bitcoin there were a number of digital cash technologies starting with the issuer based e-cash protocols of David Chaum and Stefan Brands. Adam Back developed hashcash, a proof- of-work scheme for spam control. The first proposals for distributed digital scarcity based cryp