Saturday, October 3, 2009
9 Sept 2009 Wednesday
Today 's tittle is telecommunication. There have 2 topic which are facsimile system and paging system. In facsimile system, we can faxes something to others who very far from us through the fax machine. In paging system, we can receive a message consisting of a few digits through the one-way numeric pager or send email or SMS message as well as receiving through alphanumeric pager.
...chan...
Wednesday, September 30, 2009
There are some words that i always use when sms.
~ u = you
~ v = we
~ don't = dun
~ have = hav
~ 9 = night
~ 8 = bye
~ gd = good
~ b'day = birthday
~ tat = that
~oredi = already
...chan...
30 Sept 2009 Wednesday
This post also is the last post for this assignment. Sounds good for us..hihi...
Miss Azura also have talked about how to mark our assignments and remind us still got one quiz is coming soon.
Hope that all classmates can get the result with flying colour and Miss Azura everything okie.
...chan...
Sunday, September 27, 2009
27 Sept 2009 Sunday
...chan...
Sunday, September 13, 2009
""""" RCA """""
RCA >> Radio Corporation of America, was an electronics company in existence from 1919 to 1986.
During the first years the company owned parts of the British His Master's Voice (now part of EMI) and the German Deutsche Grammophon Gesellschaft (now part of Universal). Since 2004, RCA is now the backbone of the RCA Music Group, a unit of Sony BMG, which includes J Records, RCA and Arista.
An RCA connector, sometimes called cinch plug or lotus plug, is a type of electrical connector that is commonly used in the audio or video market. For many other applications it began to replace the older hack plugs used in the audio world when component high fidelity started becoming popular in the 1950s.
In the most normal usage, cables have a standard plug on each end, consisting of a central male connector, surrounded by a ring. The ring is often segmented for flexibility. Devices mount the jack, consisting of a central hole with a ring of metal around it. The ring is slightly smaller in diameter and longer than the ring on the plug, allowing the plug's ring to fit tightly over it. The jack has a small area between the outer and inner rings which is filled with an insulator, typically plastic (very early versions, or those made for use as RF connectors used ceramic).
As with many other connectors, the RCA has been adopted for other uses than originally intended, including as a power connector, an RF connector, and as a connector for loudspeaker impedance matching. RCA connectors and cable are also commonly used to carry S/PDIF-formatted digital audio, with plugs colored orange to differentiate them from other typical connections. cables. Its use as a connector for composite video signals is extremely common, but provides poor
Connections are made by pushing the cable's plug into the female jack on the device. The signal-carrying pin protrudes from the plug, and often comes into contact with the socket before the grounded rings meet, resulting in loud hum or buzz if the audio components are powered while making connections. Continuous noise can occur if the plug partially falls out of the jack, breaking ground connection but not the signal. Some variants of the plug, especially cheaper versions, also give very poor grip and contact between the ground sheaths due to their lack of flexibility.
They are often color-coded, yellow for composite video, red for the right channel, and white or black for the left channel of stereo audio. This trio (or pair) of jacks can be found on the back of almost all audio and video equipment. At least one set is usually found on the front panel of modern TV sets, to facilitate connection of camcorders (through 3.5mm Jack to 3 RCA, also called Mini RCA plug), digital cameras, and video gaming consoles. Although nearly all audio-visual connectors, including audio, composite and component video, and S/PDIF audio can use identical 75 Ω cables, sales of special-purpose cables for each use have proliferated. Varying cable quality means that a cheap line-level audio cable might not successfully transfer component video or digital audio signals due to impedance mismatch and poor shielding quality (causing signal-to-noise ratio to be too low). Cables should meet the S/PDIF specification as defined by the international standard IEC 60958-3 for assured performance.
The male plug has a center pin which is 3.70 mm in diameter, and is surrounded by an outer shell which is 8.25 mm in diameter.
Plugs and sockets on consumer equipment are conventionally color-coded to aid correct connections. The standard colors for the various signals are shown below.
In stereo audio applications there are combination of either Black+Red or White+Red RCA connectors; in both cases, Red denotes Right. White or Purple may also be replaced by Black.
While these are the standard colours found on commercially made products, same-coloured cables may also be used. For example, a red cable may be used instead of a yellow one, as there is no other significant difference between them.
...chan...
13 Sept 2009 Sunday
...chan...
Monday, September 7, 2009
6 Sept 2009 Sunday
Lecture continue with chapter 6 section 2..topic are telephone system and cellular phone system. Some of content very similar to us, such as 3G. Our group will present on 7 October..
...chan...
Friday, September 4, 2009
~~ RazakSAT Satellite ~~
The RazakSAT mission is to ensure the availability of satellite imaging for any part of Malaysia in order to fulfill the requirements of the local remote sensing user community. Malaysia has been dependent on remote sensing satellite imagery provided by other Satellite Operating Agencies (SOAs) that have been constrained by cloud and timeliness. To alleviate those constraints, RazakSAT will be uniquely placed in a Low Earth Near Equatorial Orbit (NEqO). RazakSAT will carry the Medium-sized Aperture Camera (MAC) which is an electro-optical payload of a pushbroom type with 5 linear detectors (1 panchromatic, 4 multispectral). At a nominal altitude of 685 km and 9° inclination orbit, it will provide an optimal number of 14 passes a day over Malaysia thereby increasing its imaging opportunity by over 3 times compared to a satellite orbiting the Earth in the more popular Sun-Synchronous Orbit (SSO). The NEqO enables RazakSAT to provide higher imaging opportunity for Malaysia and other countries that are situated in the near equatorial belt of 9° North and South of the Equator.
RazakSAT offers a Panchromatic band (510 - 730 nm) and 4 Multispectral Bands: Band 1: Blue (450 - 520 nm); Band 2: Green (520 - 600 nm); Band 3: Red (630 - 690 nm) and Band 4: Near-Infrared (760 - 890 nm). The spatial resolution of 2.5 m and 5 m for Panchromatic and Multispectral, respectively, covers a swath width of 20 km at the 685 km nominal altitude. Data is being quantized into 8 bits of 256 brightness values to represent information.
As Malaysia is located between latitude 1° - 9° North and longitude 98° - 120° East, the image acquisition is optimum when the orbit is inclined at 9° to provide 14 passes daily over Malaysia and other countries in the near equatorial region with 1 to 4 times imaging opportunities per day. The average contact duration of about 500 seconds with 30 Mbps transmission rate enables downloading an image strip size of 11.52 Gbits for a nominal scene size of 20km by 200km.
Remote sensing applications have been widely utilized in Malaysia by various government agencies and private sector. This user community is targeted to be the immediate beneficiaries that will realize the full exploitation of the RazakSAT data for various applications in the country and the region. In the same time, other users within the near equatorial belt will also reap the benefits from this accessible high resolution satellite imagery.
The development of RazakSAT and MAC would be a benchmark for future missions to improve for higher and better performance remote sensing technology. The infrastructure establishment of a space system like RazakSAT through human capital development and facilities sets the fundamentals for ATSB to advance into the future with the motivation to contribute towards space technology and remote sensing through local and international collaborations and providing products and services locally and internationally.
...chan...
Thursday, September 3, 2009
2 Sept 2009 Wednesday
...chan...
Sunday, August 30, 2009
....MESH Topology & TREE Topology....
A mesh network is reliable and offers redundancy. If one node can no longer operate, all the rest can still communicate with each other, directly or through one or more intermediate nodes. Mesh networks work well when the nodes are located at scattered points that do not lie near a common line.
The chief drawback of the mesh topology is expense, because of the large number of cables and connections required. In some scenarios, a
TREE Topology
is a combination of the bus and the Star Topology. The tree like structure allows you to have many servers on the network and you can branch out the network in many ways. This is particularly helpful for colleges, universities and schools so that each of the branches can identify the relevant systems in their own network and yet connect to the big network in some way.
A Tree Structure suits best when the network is widely spread and vastly divided into many branches. Like any other topologies, the Tree Topology has its advantages and disadvantages. A Tree Network may not suit small networks and it may be a waste of cable to use it for small networks. Tree Topology has some limitations and the configuration should suit those limitations.
The Tree Topology follows a hierarchical pattern where each level is connected to the next higher level in a symmetrical pattern. Each level in the hierarchy follows a certain pattern in connecting the nodes. Like the top most level might have only one node or two nodes and the following level in the hierarchy might have few more nodes which work on the point to point connectivity and the third level also has asymmetrical node to node pattern and each of these levels are connected to the root level in the hierarchy. Think of a tree that branches out in various directions and all these branches need the roots and the tree trunk to survive. A Tree Structured network is very similar to this and that is why it is called the Tree Topology.
...chan...
30 Aug 2009 Sunday
...chan...
Friday, August 28, 2009
Twisted Pair Wired vs Coaxial Cable vs Fiber Optic Cable
Advantages
~ inexpensive and readily available
~ flexible and light weight
~ easy to work with and install
Disadvantages
~ susceptibility to interference and noise
~attenuation problem
~ for analog, repeaters needed every 5-6km
~ for digital, repeaters needed every 2-3km
~ relatively low bandwidth (300Hz)
Coaxial Cable
Advantages
~ higher bandwidth - 400 to 600 Mhz
- up to 10800 voice conversations
~ can be tapped easily (pros and cons)
~ much less susceptible to interference than twisted pair
Disadvantages
~ high attenuation rate makes it expensive over long distance
~ bulky
Fiber Optic Cable
Advantages
~ greater capactity (bandwidth of up to 2 Gbps)
~ smaller size and lighter weight
~ lower attenuation
~ immunity to environmental interference
~ highly secure due to tap difficulty and lack of signal radiation
Disadvantages
~ expensive over short distance
~ requires highly skilled installers
~ adding additional nodes is difficult
...chan...
Thursday, August 27, 2009
Wednesday, August 26, 2009
26 Aug 2009 Wedenesday
...chan...
Friday, August 14, 2009
12 August 2009 Wednesday
very ashamed with the quiz...
Miss Azura, take good care..
...chan...
Sunday, August 9, 2009
9 Aug 2009 Sunday
Before dismissed the class, MIss Azura announced that got quiz on Wednesday...HAizzz..
...chan...
Thursday, August 6, 2009
^^ MyEG Portal^^ vs ^^ Rilek Portal^^
~~ MyEG Services Berhad is a concessionaire for the Malaysian E-Government MSC Flagship application. MyEG offers the public a single point of contact between the government and the public through their portal. The services they provide including renewing road tax, car insurance, paying summonses, Kuala Lumpur City hall assessment and even some utility bill payments. This portal enables Malaysians to dynamically interact with numerous agencies within the Federal, State and the Local Government machinery providing services ranging from information searches to licence applications.
MyEG was officially launched on April 17 2008.
http://www.myeg.com.my
^^ Rilek Portal ^^
~~ELECTRONIC TRANSACTION
Introducing RILEK as the revolutionary way to perform all your e-government services:
Jabatan Pengangkutan Jalan (JPJ)
Polis DiRaja Malaysia (PDRM)
Telekom Malaysia Berhad (TMB)
Tenaga Nasional Berhad (TNB)
RILEK offers JPJ Driving Licences services, summons payments and inquiries on Kejara points, include electronic utility bill payment for TNB and Telekom bills. Go online and experience hands-on the technologically advanced payment method, minus the hassle, queues, and frustrations. You can complete all your billing payments and inquiries in an instant, comfortably from anywhere.
http://www.rilek.com.my/
...chan...
...< B2C >...< B2B >...< B2C >...
...< B2B >= business ti business~~ typically takes the form of automated processes between trading partners and is performed in much higher volumes than business-to-consumer (B2C) applications. For example, a company that makes chicken feed would sell it to a chicken farm, another company, rather than directly to consumers. B2B can also encompass marketing activities between businesses, and not just the final transactions that result from marketing.
...< C2C >= consumer to consumer(or citizen-to-citizen)~~ involves the electronically-facilitated transactions between consumers through some third party. A common example is the online auction, in which a consumer posts an item for sale and other consumers bid to purchase it; the third party generally charges a flat fee or commission. The sites are only intermediaries, just there to match consumers. They do not have to check quality of the products being offered.
...chan...
5 Aug 2009 Wednesday
...chan...
Sunday, August 2, 2009
2 Aug 2009 Sunday
** Miss Azura, sorry for the late. **
...chan...
Wednesday, July 22, 2009
Microsoft Windows vs Apple Mac OS
Apple Mac OS X and Microsoft Windows are two of the most widely used desktop operating systems. Apple's Mac OS X is more commonly known as just simply: "OSX" and is developed by Apple Computer for their own line of PCs, often referred to as "Macs." Windows is developed by Microsoft for any PC (including Apple's).
Releases
OS X and Windows both have a long line of releases in their history. The X in OS X stands for 10, signifying the 10th major release of the Mac operating system. Within the Mac OS X line-up, there have been incremental sub-versions named after felines. Windows began with 1.0, following the numeric system until 3.1 and then switched to NT4. Since then, Windows 95, Windows 98, Windows Me, Windows XP, Windows Vista, and Windows 7 have followed for personal computing, while others, including Windows 2000, Windows 2003, and Windows 2008 were released as enterprise operating systems.
Market Share
The percentage of the market held by either OS is always going to be a murky, unclear answer. According to one source, Windows has a market share of 91.8% compared to OS X with 7.3% [1]. While other sources may claim only 5%, or 3% for OS X depending on how they look at the data. Although the iPhone does run Mac OS X, some do not count it as such in their market share research. Also, sales numbers do not necessarily reflect the true popularity of Windows as most new PCs come with Windows pre-installed, but some users may opt to install a different OS after purchase.
Software
Bundled Software
Software Type | Mac OSX | Windows |
---|---|---|
Web Browser | Safari | Internet Explorer |
Media Player | iTunes / QuickTime | Windows Media Player |
Photo Management | iPhoto | Windows Photo Gallery |
Movie Production | iMovie | Windows Movie Maker |
Development Tools | XCode | None |
PDF Viewer | Preview | None |
Calendar | iCal | Windows Calendar |
DVD Authoring | iDVD | Windows DVD Maker |
WYSIWYG Website Authoring | iWeb | None |
Chat | iChat | Windows Messenger |
Available Software
Software | Mac OSX | Windows | |||
---|---|---|---|---|---|
OpenOffice | yes | yes | |||
Adobe CS3 | yes | yes | |||
Microsoft Office | yes | yes | |||
Firefox | yes | yes | |||
3ds Max | no | yes | |||
AutoCAD | no | yes | |||
Maya | yes | yes | |||
Houdini | yes | yes | |||
Logic | yes | no | |||
Final Cut | yes | no | |||
SoftImage XSI | no | yes |
Security
Malware
In order for software to significantly modify Mac OS X, you have to type in your password... A Mac gets much of this out-of-the-box protection from its open source UNIX heritage. The most critical components of Mac OS X are open for review by a worldwide community of security experts.
Apple touts this feature as an advantage over (pre-Vista) Windows: "On a Windows PC, software (both good and evil) can change the system without your even knowing about it."
Windows Vista recently started to focus more on security by implementing a stricter user-permission policy, but many users feel that the strict policy is more annoying than useful.
Hence, there is no architectural advantage in security between Mac OSX and Vista concerning this point.
Viruses
Developers often capitalize on Windows' large market share and significant vulnerabilities when creating viruses and other malicious software. Some counts place the number of Windows/MS-DOS viruses at over 50,000. In the past, Microsoft's solution to this problem was insufficient.
Infection of Macs running OS X is extremely rare, and there has never been a large-scale infection of computers running OS X. The latest version of Mac OS X added sandboxing to improve protection against malware and trojans, but it cannot protect against all possible applications users can install.
Patches
Both Macs and Windows have patches and/or updates provided online by Apple and Microsoft, respectively. Through one simple button-click change in the System Preferences this can be on or off, to differing degrees. Ever since the release of Mac OSX 10.1 on September 25, 2001 as a 'free update' to version 10.0, Macs can download these automatically or the [owner or administrator] user has the option of accepting these downloads or not: "New software is available for your computer. If you're not ready to install now, you can use the Software Update preference to check for updates later." In Windows XP and Vista, the user has the option of turning automatic updates on or off as well.
22 July 2009 Wednesday
...chan...
19 July 2009 Sunday
...chan...
Monday, July 20, 2009
My cct 1023 classmate^^
Name: AARRON
From: PENANG
Hobby: PLAY FOOTBALL
colour: BLACK place: PUB
Name: ANGGIE
From: INDONESIA
Hobby: PLAY TENNIS
colour: BLUE
place: CINEMA
Name: CHIN SOOK PENG
From: PAHANG
Hobby: WATCH MOVIE
colour: BLUE
place: KOREA
Name: CHIN XIN YING
From: KEDAH
Hobby: SINGING
colour: PURPLE
place: SHOPPING MALL
Name: CHUAH
From: PERAK
Hobby: SINGING
colour: PINK
place: SHOPPING CENTRE
Name: FISHI
From: PERAK
Hobby: LISTEN TO MUSIC
colour: SILVER
place: CAFE
Name: FONG
From: SARAWAK
Hobby: WATCH TV
colour: PURPLE
place: BEACH
Name: HANIS
From: PENANG
Hobby: SURF INTERNET
colour: PURPLE
place: MALLS
Name: IZAHAR
From: KEDAH
Hobby: SURF INTERNET
colour: GREEN & YELLOW
place: BEACH
Name: KALAI
From: KEDAH
Hobby: CHATTING
colour: BLACK & WHITE
place: LANGKAWI
Name: KATHERINE
From: SELANGOR
Hobby: PLAY BADMINTON
colour: BLUE
place: SHOPPING
Name: KONG LING EU
From: KL
Hobby: PLAY FOOTBALL
colour: BLACK
place: YAB CAFE
Name: LEA
From: PERAK
Hobby: READING
colour: WHITE
place: FOODCOURT
Name: LEE YIP MUN
From: SELANGOR
Hobby: READING
colour: BLUE
place: SHOPPING CENTRE
Name: LINA
From: SABAH
Hobby: LISTEN TO RADIO
colour: GREEN
place: MY ROOM
Name: LOGIS
From: KELANTAN
Hobby:LISTEN TO MUSIC
colour: PINK
place: TUMPAT
Name: MIEY
From: PERLIS
Hobby: WALL CLIMBING
colour: RED, WHITE & BLACK
place: ALL CAFE IN M'SIA
Name: MIMI
From: PERAK
Hobby: SINGING
colour: BLACK
place: HOMETOWN
Name: MIT
From: PERLIS
Hobby: CHATTING
colour: RED
place: SHOPPING CENTRE
Name: NAD
From: KEDAH
Hobby: READ NOVEL
colour: BLUE
place: MY ROOM
Name: NADIA
From: PERAK
Hobby: SHOPPING INTERNET
colour: PURPLE
place: SHOPPING CENTRE
Name: NAQIA
From: JOHORE
Hobby: READING
colour: BLUE
place: SHOPPING MALL
Name: NURUL
From: INDONESIA
Hobby: TRAVELLING
colour: BROWN
place: MALL
Name: PEI CHIN
From: PAHANG
Hobby: JOGGING
colour: BLUE
place: KL
Name: RAJI RIDWAN
From: NIUGERIA
Hobby: TALKING
colour: BLUE
place: KL
Name: ROSELIN
From: JOHORE
Hobby: CYCLING
colour: WHITE
place: FRIEND'S ROOM
Name: SAN
From: PERAK
Hobby: LISTEN TO MUSIC
colour: SILVER
place: CAFE
Name: SANDRA
From: SABAH
Hobby: CHATTING
colour: RED
place: MY ROOM
Name: SAYARE
From: SELANGOR
Hobby: SURF INTERNET
colour: PINK
place: PUTRAJAYA
Name: SEHA
From: TERENGGANU
Hobby: CHATTING
colour: BLACK & WHITE
place: PUTRAJAYA
Name: SIMON
From: PENANG
Hobby: PLAY PIANO
colour: PURPLE
place: REDBOX
Name: TIEU SIAK KIA
From: PENANG
Hobby: PLAY COMPUTER
colour: PURPLE
place: SHOPPING CENTRE
Name: UMMI
From: KEDAH
Hobby: CHATTING
colour: RED
place: JITRA
Name: WAI KEE
From: MELAKA
Hobby: PLAY BADMINTON
colour: RED
place: CAFE
Name: YANA
From: SABAH
Hobby: SHOPPING INTERNET
colour: ALL COLOUR
place: TIMES SQUARE, SUNGAI WANG
Name: YAW
From: KL
Hobby: SLEEPING
colour: WHITE
place: YAB
Name: YEN PIN
From: PAHANG
Hobby: SHOPPING
colour: PINK
place: SHOPPING CENTRE
Name: YUSOF
From: SELANGOR
Hobby: SURF INTERNET
colour: BLACK & WHITE
place: KL
Name:ZA
From: TERENGGANU
Hobby: CHATTING
colour: BLE
place: SHOPPING COMPLEX