To ensure self-renewal, stem cells undergo two types of cell division (see Stem cell division and differentiation diagram). Symmetric division gives rise to two identical daughter cells both endowed with stem cell properties. Asymmetric division, on the other hand, produces only one stem cell and a progenitor cell with limited self-renewal potential. Progenitors can go through several rounds of cell division before terminally differentiating into a mature cell. It is possible that the molecular distinction between symmetric and asymmetric divisions lies in differential segregation of cell membrane proteins (such as receptors) between the daughter cells.[21]
An alternative theory is that stem cells remain undifferentiated due to environmental cues in their particular niche. Stem cells differentiate when they leave that niche or no longer receive those signals. Studies in Drosophila germarium have identified the signals dpp and adherins junctions that prevent germarium stem cells from differentiating.[22][23]
The signals that lead to reprogramming of cells to an embryonic-like state are also being investigated. These signal pathways include several transcription factors including the oncogene c-Myc. Initial studies indicate that transformation of mice cells with a combination of these anti-differentiation signals can reverse differentiation and may allow adult cells to become pluripotent.[24] However, the need to transform these cells with an oncogene may prevent the use of this approach in therapy.
http://en.wikipedia.org/wiki/Stem_cell
With the highly successful KE850 Prada and KU990 Viewty, it's a point taken for LG - users just love their touchscreen handsets with big displays and no keypads.
Seeing the next in line was only a matter of time and last summer's announcement LG KS20 makes a glorious entry running on Windows Mobile 6.0 Professional.
LG KS20 official photos
The new KS20 obviously takes after the prominent KE850 Prada, losing the haute couture ring to its name but adding some Pocket PC depth to the picture. The LG KS20 is a sleek lightweight phone of compact (in Pocket PC terms) dimensions and a large 2.8" QVGA TFT display. The handset has the mere Call and End keys and a joystick on the front - a direct reference to the Prada looks.
Just as HTC are venturing to pitch their handsets beyond the confines of the smartphone segment, the LG are somewhat unwilling to make Windows Mobile Pro the focal point of the LG KS20. They are keen to have the KS20 rub shoulders with the Viewty and the Prada and keep it hush about the Pocket PC in most of their marketing.
By the way, LG have their own personal touch to the Pocket PC platform. With the KS20 we get a custom LG implementation of the user interface. Also to mention is the very useful PSNote application. LG KS20 also brings two very amusing games (at least the Vodafone firmware handset that we tested) and Google Maps. More on this later on.
At this stage, there is only a black version of LG KS20 available, but given the LG approach, a silver version is sure to follow somewhere in the future. We already saw this happening with both LG KU990 Viewty and the LG Prada, which recently got dark silver outfit.
LG KS20 will be standing its ground to a mixed bunch. HTC Touch and Samsung Armani just come to mind on the spur for the fashion and for the smart of it. But we may as well make it a complete Apple and oranges.
The KS20 next to Apple iPhone and LG KU990 Viewty
LG KS20 provides customers with an advanced mobile internet experience with its ’Broadband Mobile Internet’, ’2.8 inch Large Screen’ and ’Intuitive Touch Input,’ and is only 12.8 mm thick. Compatible with highly advanced Broadband Mobile Internet networks, the phone allows users to enjoy the full benefits of 3.6Mbps mobile internet, music downloads, video clips and Windows Live! ™ content, as well as push email.
• 2Mega pixel Auto Focus Camera
- Auto focus, Optical Zoom, Flash
• MP3 Player
- 128MB internal memory + Micro SD external memory card slot (up to 2GB Expandable)
- Windows Media DRM Playback (over 1 million songs from 14 online partners)
- Pluggable 3rd party DRM and CODECs
• Downloadable free applications
- Game, utility, business applications
- Auctions eBay, MySpace and Google Map Service etc.
• Bluetooth v2.0
| Messaging | |
| SMS/EMS/MMS | ●/●/● |
| Video MMS | ● |
| ● | |
| Predictive Text Input (T9) | ● |
| Basic Specifications | |
| Type | slider |
| RF band | 900/1800/1900 |
| Dimension [LxWxD] (mm) | 99.8 x 50.6 x 13.8 |
| Weight with Batt. Standard (g) | 118 |
| Standard Battery, Max (mAh) | 800 mAh,Li-on(Inner Pack) |
| Stand-by Time, Max (hrs) | 280 hour |
| Talk Time (hrs) | 2hr 40min |
| Vibration Alert | ● |
| SIM Toolkit | ● |
| Data/Fax | ●/● |
| GPRS | ●(10) |
| Internet | |
| WAP (version) | ●(2.0) |
| Download/Save as Support | ● |
| Data Connectivity | |
| USB/PC Sync | ●/● |
| PIM | |
| Scheduler/Alarm | ●/● |
| Phonebook (# of names) | ●(1000) |
| Personalization | |
| Wallpaper/Screen Saver | ●/- |
| Picture/Ringtone Downloading | ●/● |
| Advanced Features | |
| Java (version) | ●(MIDP 2.0) |
| MIDI (palyphonic) | ●(40) |
| Key Tone Effect | ● |
| Built-in Game (# of games) / Java Game (data CD) | ●(2)/● |
| VOD/AOD | ●/●(AAC,AAC+,AAC++) |
| Image/Video Capture | ●/● |
| Camera | ●(2M, AF CMOS) |
| Internal Memory (MB) | Over 50M Byte |
| External Memory (MB) | ● |
| Voice Memo | ● |
| Bluetooth | ●(1.2) |
Enrich Mobile Internet Experience
LG KS20 provides customers with an advanced mobile internet
experience with its ‘Broadband Mobile Internet’, ‘2.8 inch Large
Screen’ and ‘Intuitive Touch Input,’ and is only 12.8 mm thick.
Compatible with highly advanced Broadband Mobile Internet
networks, the phone allows users to enjoy the full benefits of
3.6Mbps mobile internet, music downloads, video clips and
Windows Live! ™ content, as well as push email.
Application of the 2.8 inch large screen allows you to have an easy-to-use mobile internet environment which
is just the same as that of a PC screen. Also, the landscape function provides you with the optimum
convenience to enjoy video clips.
A completely flat touchscreen, a perfectly stylish and slim design and a fluent and direct interaction further enhances your mobile internet convenience.
With LG KS20, you can enjoy your mobile internet experience anywhere at any time.
Faster means more
Enhanced Usability
Microsoft OS & Windows Mobile 6
Stylish & Slim Design
Advanced feature
