oad of social media followers and email
subscribers.
You can approach blogs in your niche to see if they are willing to host
giveaways. In this case, it’s always best to only target those blogs that have a
decent following. You can check up on this using either their social media
profiles or the number of comments they receive as a gauge.
The rules for entering a contest could be to sign up for your email list or
follow you on social profiles, or a combination of those.
Be careful, though - once you run the contest, you will find yourself with a
giant social following and a huge email list - both of which may go to waste
if you don’t have some content ready for them to consume!
Quick Tip: If you sell something really expensive, you don’t need to
giveaway the product itself - you can even do a giveaway of a gift certificate.
·
network
infrastructure. Wireless technologies
(e.g., BT, WLANs, cellular telephony) vary on the degree of bandwidth and
reliability they provide. In this
respect one can speak of variable bandwidth .
Another phenomenon also observable
in the wireless world is bursty traffic. As Norros and others have found
out (Norros, et al. 1995, 1999, 2000),
in Internet-type networks, the traffic pattern is bursty, and this holds in
different time scales (so it is "fractal" in a sense).
·
Variant Tariffs: For some networks (e.g., in cellular telephones),
network access is charged per connection-time, while for others (e.g., in
packet radio), it is charged per message (packet). In the WAP environment there
is a larger variety of tariffs, e.g. session-based, transaction-based,
connection time-based while in Mobile E-Commerce the range of tariffs is even
wider.
1.1
Device
properties
Mobile devices that are of
interest to MEC can be divided into four categories based on their processor,
memory and battery capacity, application capabilities (SMS, WAP, Web), as well
as physical size and weight. These categories are (from weakest to strongest): usual voice handsets
with SMS capability, WAP phones, Communicators/PDA+wireless communication
capability, and finally laptops with wireless communication facilities.
To be easily carried around,
mobile devices must be physically light and small. Everybody, who has dragged a
3 kg laptop would say that it is not practical for anywhere anytime computing.
On the other hand, a usual wireless phone weighing less than 100 g is easy
to carry but cumbersome to write anything long due to the small
multifunction keypad. PDA class is a compromise that has already the WAP and/or
Web capabilities. Such considerations, in conjunction with a given cost and
level of technology, will keep mobile elements having less resources than
static elements. Thus, we can argue for the following invariants in these
device classes:
·
The physical size of the
device should be such that it can be carried in a pocket and it should not
weigh more than 100-200 grams. On the other hand, it should not be too small,
because then it becomes impossible to use the keypad and also use the device into
voice traffic. Going below 100 g is not necessary. Neither is it possible, if the battery is expected to last a reasonable
time between recharging (see below).
·
As a consequence of the
above, the optimal portable devices have small screens and small, multifunction
keypads; the former fact necessitates
the development of appropriate visual user interfaces, different from the PC or
laptop. The visual interfaces can use colours; voice-based interfaces can be also used in a natural
way. For the latter, the physical size
of the device is not so important,
whereas for the former it is. The keypad must have a minimal physical size in
order to be usable. Unless clever new technologies are invented to replace the keypad, it and the screen
determine the lower bound for the size of the devices.
·
Portable or embedded
devices have less resources than static elements, including memory, disk
capacity (usually absent from the three lower classes) and computational power
than traditional computing devices. This is, however, only relative. The
processor capacity of the current PDAs is at the level of a PC five years ago, and probably in a few
years the 1 GHz clock speed processors will have reached the handsets. With
memory the development is similar, because the memory chips also will contain more bits in the same physical
space. The only problem is that the more
speed the processor has, the more energy it tends to consume, because the
voltage used in the circuitry tends
to be higher in fast processors.
·
Portable devices rely for
their operation on the finite energy provided by batteries. Even with advances
in battery technology, this energy concern will not cease to exist. This is
because the conserved energy depends primarily on the weight volume of the
battery. Different technologies have in this respect different
coefficients, but the law is the same.
Thus, the tendency might be that larger and larger part of the device's weight
and volume consists of the battery and smaller part of the circuitry in the
future.
