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XML이 전자상거래 분야에서 정착되기 위해서는 XML 요소를 보다 안전하게 디지털 서명하고 암호화하는 표준 방법이 제시되어야 한다. 이러한 특징은 전자상거래에서 특히, 계약서, 견적서 또는 지불 거래와 같은 민감한 컨텐츠나 금융신용장을 나타내는 문서에 대해 중요
Foursquare is location –based online service that allowed users to “check in” to a location using an application on a smartphone.
Using GPS
Connects your devices and
web browser into a social
network
Users can view other users who
had ckecked in to the same venue
but were strangers
Users are able to see where their
friends are and what they’re doing
in real-tim
1) 위치관련정보 획득 : 증강현실 App을 실행해서 아무건물이나 비추면 휴대폰의 현재위치, 휴대폰이 향하고 있는 방향 그리고 기울어진 정도를 단말기에서 제공하는 API(기능)를 이용해 얻는다.
2) 위치관련정보 서버로 송신 : 획득한 위치관련정보는 위치정보 시스템으로 전송하게 된다. 여기서 위치정
registration system like figure 2. They used program asking students to type their mySNU ID and password, the school account. Although this program didn’t have time limitation failing to solve the problem of insufficiency of seats, this was helpful to prevent the monopoly of seats. One student only can register for one seat. Nowadays, even this program doesn’t work well. Few computers are equ
4) Whatever customers want.
There are 25 suite rooms in the hotel and one butler is involved in each suite room. These butlers are always ready for the customers. For example, all kinds of foods are prepared so customers can select whatever they want. The customers just let butlers know to reserve the best quality restaurant in Milan a day before. Moreover, an opera that has to be reserved at le