Minggu, 03 Februari 2013

E-commerce


E-commerce or Electronic Commerce, is a type of transaction where buying and selling of product or service through the electrical systems such as internet and other computer networks. In this era,  e-commerce  has grown and become a part of society lifestyles.  People began to switch from conventional transactions into electronic trancactions.  Now e-commerce is growing in various type of procducts, however society still need more education about how to use e-commerce safe and responsible, so that society understand the protection against cyber crime in the name of e-commerce.



VvVvVvV




To educate the society about e-commerce, we can make advertising about e-commerce via television, or we can make a tutorial in the site about how to do transactions, how to pay, and how the transaction get protected.


In tutorial, firstly, people must know how to get contacted with the seller. Usually we can get contacted via call, chat and email. Second, people must know how the transactions works.
Here’s how the it works : a seller lists item and item’s price on the site, and then buyer can choose what item that they want to buy. Then item will entry to cart. After that,buyer will need to entry buyer personal data, and address that receive the item. After that, seller will send invoice how much buyer need to pay.  Usually payment methods via bank. After buyer transfer the payment, buyer should confirm the payment to seller. And then seller will send the item.

in many e-commerce, they will protected the transaction from external parties. they will use cookies, web beacons, to help protect user privacy. Cookies are small files placed on user's hard drive computer. Most cookies are "session cookies," that they will automatically deleted from user's hard drive when they sign out from the site. Web beacon is an electronic image placed in the code of a web page. web beacon use  to monitor the traffic from user and to improve site performance.

Rabu, 14 November 2012

Algoritma Pengacakan Kartu


Pertama-tama , kita mendeskripsikan 5 kartu sebagai berikut :
Kartu
 A B C D E 

Kemudian kita memilih salah satu kartu yang di deskripsikan dengan variabel K, nilai K harus lebih kecil atau sama dengan jumlah kartu.
misalkan nilai K = 2
maka, kartu urutan ke-2 di ambil
Kartu
 A B C D E 

setelah itu, kita mengulang pengambilan nilai K kembali,
misalkan nilai K= 3
maka, Kartu urutan ke-3 di ambil
Kartu
 A B C D

Kemudian kita mengulang pengambilan nilai K, sampai kartu habis.