Wednesday, March 2, 2011

Brightness Control for small Lamps


Parts:

P1________________470K Linear Potentiometer

R1_________________10K 1/4W Resistor
R2_________________47K 1/4W Resistor (See Notes)
R3__________________1K5 1/4W Resistor

C1_________________22nF 63V Polyester Capacitor
C2________________100µF 25V Electrolytic Capacitor

D1,D2___________1N4148 75V 150mA Diodes

IC1_______________7555 or TS555CN CMos Timer IC

Q1_______________BD681 100V 4A NPN Darlington Transistor

LP1_______________1.5V 200mA Bulb (See Notes)

SW1_______________SPST Switch

B1__________________3V (Two 1.5V AA or AAA cells in series, etc.)
Circuit operation:
This device was designed on request, to control the light intensity of four filament lamps (i.e. a ring illuminator) powered by two AA or AAA batteries, for close-up pictures with a digital camera. Obviously it can be used in other ways, at anyone's will.
IC1 generates a 150Hz square wave having a variable duty-cycle. When the cursor of P1 is fully rotated towards D1, the output positive pulses appearing at pin 3 of IC1 are very narrow. Bulb LP1, driven by Q1, is off as the voltage across its leads is too low. When the cursor of P1 is rotated towards R2, the output pulses increase in width, reaching their maximum amplitude when the potentiometer is rotated fully clockwise. In this way the bulb reaches its full brightness.

Notes:
LP1 can be one or more 1.5V bulbs wired in parallel. Maximum total output current allowed is about 1A.
R2 limits the output voltage, measured across LP1 leads, to 1.5V. Its actual value is dependent on the total current drawn by the bulb(s) and should be set at full load in order to obtain about 1.5V across the bulb(s) leads when P1 is rotated fully clockwise.

Variable DC Power Supply


Voltage range: 0.7 - 24V
Current limiting range: 50mA - 2A


Parts:

P1____________500R Linear Potentiometer
P2_____________10K Log. Potentiometer

R1,R2___________2K2 1/2W Resistors
R3____________330R 1/4W Resistor
R4____________150R 1/4W Resistor
R5______________1R 5W Resistor

C1___________3300µF 35V Electrolytic Capacitor (see Notes)
C2______________1µF 63V Polyester Capacitor

D1,D2________1N5402 200V 3A Diodes
D3_____________5mm. Red LED

Q1____________BC182 50V 100mA NPN Transistor
Q2____________BD139 80V 1.5A NPN Transistor
Q3____________BC212 50V 100mA PNP Transistor
Q4 __________2N3055 60V 15A NPN Transistor

T1_____________220V Primary, 36V Center-tapped Secondary
50VA Mains transformer (see Notes)

PL1____________Male Mains plug

SW1____________SPST Mains switch
Device purpose:
A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist's workbench. This circuit is not an absolute novelty, but it is simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A. Well suited to supply the circuits shown in this website. You can adapt it to your own requirements as explained in the notes below.

Notes:
P1 sets the maximum output current you want to be delivered by the power supply at a given output voltage.
P2 sets the output voltage and must be a logarithmic taper type, in order to obtain a more linear scale voltage indication.
You can choose the Transformer on the grounds of maximum voltage and current output needed. Best choices are: 36, 40 or 48V center-tapped and 50, 75, 80 or 100VA.
Capacitor C1 can be 2200 to 6800µF, 35 to 50V.
Q4 must be mounted on a good heatsink in order to withstand sustained output short-circuit. In some cases the rear panel of the metal box in which you will enclose the circuit can do the job.
The 2N3055 transistor (Q4) can be replaced with the slightly less powerful TIP3055 type.

Thursday, February 24, 2011

1992-Colourful cricket, and that rain rule


World Cup
No. 5

Minnows
Zimbabwe

Format
This was the World Cup that thought it was a league. All played all in a qualifying round that went on forever. It was fair but about as exciting as the Nullarbor Plain. The good news was that South Africa joined in for the first time, following the end of apartheid.

Innovations
Four big ones. The players wore coloured clothing, with names on the back. There were floodlights for most of the 36 games. The white ball - in fact two of them, one at each end (so they didn't get too grubby), which meant they swung prodigiously. The fielding-circle rules were refined, allowing only two men outside the ring in the first 15 overs; after the first 15 it was as before: a minimum of four inside the circle. Result: the birth of the pinch-hitter. Ian Botham did the job for England, and Mark Greatbatch was deployed by New Zealand.
Early running
Australia, the holders and hosts, were such hot favourites that the pressure got to them. They lost the opening game, in New Zealand (Martin Crowe 100 not out), and then faced England in Sydney. Botham sniffed the chance to trample Australia into the dirt for one last time and took 4 for 31 and then made 53 not out as England won by eight wickets. Pakistan started dreadfully, losing to West Indies by 10 wickets, and would have gone out if rain had not saved them in Adelaide after England bowled them out for 74. England and New Zealand were the best teams for a long time, but both had peaked too soon. Imran Khan famously told his team: "Listen, just be as if you were a cornered tiger," and they moved into top gear.

The semis
What's Afrikaans for "We wuz robbed"? South Africa, playing England, needed 22 off 13 balls when it rained in Sydney. By the time it stopped, they needed 21 off one ball. New Zealand's brave run came to an end as Pakistan successfully chased 263, with the unknown Inzamam-ul-Haq thumping 60 off 37 balls.

The final
Pakistan were on fire at the MCG, and England were not. Derek Pringle (3 for 22) removed the openers, but Imran Khan and Javed Miandad made 72 and 58 as Pakistan recovered to 249 for 6. England were soon 69 for 4 (Botham 0), and when Neil Fairbrother (62) and Allan Lamb (31) launched a recovery, Wasim Akram snuffed it out, bowling Lamb and Chris Lewis with consecutive beauties. Pakistan won by 22 runs.

Controversies
There was only one of note: the rain rule, drawn up by a panel of experts, including Richie Benaud, for matches affected by bad weather. The idea behind the rule was to avoid the old system - work out the runs-per-over of the first innings and then deduct that for each over lost by the side batting second - which heavily disadvantaged the side batting first. Under the rain rule, the reduction in the target was to be proportionate to the lowest scoring overs of the side batting first, a method that took into account the benefits of chasing, as opposed to setting, a target. The rule raised eyebrows during the washout between England and Pakistan in Adelaide and was utterly discredited when South Africa's chances of qualifying for the final were shattered by 12 minutes of rain, which changed an achievable equation to an impossible one.

Tuesday, February 22, 2011

Cell-Phone calling Actuator


Parts:

R1,R3,R4,R6______1M 1/4W Resistors
R2_______________3K9 1/4W Resistor
R5,R8____________1K 1/4W Resistors (Optional: see Text)
R7______________10K 1/4W Resistor

C1_____________100nF 63V Polyester or Ceramic Capacitor
C2_______________1µF 63V Polyester or Electrolytic Capacitor
C3______________10µF 25V Electrolytic Capacitor
C4______________10nF 63V Polyester or Ceramic Capacitor
C5_____________470µF 25V Electrolytic Capacitor

D1,D4_________1N4148 75V 150mA Diodes
D2,D3___________LEDs 3 or 5mm. (Optional: see Text)

Q1_____________BC547 45V 100mA NPN Transistor
Q2_____________BC557 45V 100mA PNP Transistor
Q3_____________BC337 45V 800mA NPN Transistor

IC1_____________4069 Hex Inverter IC
IC2_____________7555 or TS555CN CMos Timer IC

L1______________10mH miniature inductor

RL1____________Relay with SPDT or DPDT switch
Coil Voltage 12V. Coil resistance 200-300 Ohm

J1_____________Two ways output socket
Comments:
This design is a development of the well known Cellular Phone calling Detector circuit. Many correspondents required a circuit of this kind but capable of driving a relay and supplied at 12V.
The final circuit adds to the original pulse detector coil and transistor amplifier a further amplifier and squarer, a pulse to dc converter, a timer and the relay driver.
The timer was necessary to avoid false triggering: in this way the relay will be energized only after the cell-phone is ringing since at least 10 seconds.

Circuit operation
Q1 amplifies the signal generated by the cell-phone during an incoming call and detected by L1. IC1A wired as an analog amplifier drives three inverters in series (IC1B, IC1C and IC1D) acting as square wave converters. IC1E and related components form the pulse to dc converter: when a train of pulses appears at IC1D output, a 12V steady positive voltage is present at the output of IC1E.
An optional LED (D2) can be useful to signal that a call is incoming, mainly when the cell-phone is muted.

Q2, IC2 and related components form a 10-seconds timer followed by the relay driver (IC1F and Q3).
When the output of IC1E is low, the output of IC2 is high: therefore the output of the inverter IC1F is low and Q3 is cut off.
When the output of IC1E is high, C3 starts charging through R6 and after about 10 seconds IC2 will be triggered and its output voltage will fall to zero, forcing the output of IC1F to go high: this causes the transistor to conduct and the relay will be energized.
The LED D3 is optional and can be useful to signal when the relay is on.

Notes:
A commercial 10mH miniature inductor, usually sold in the form of a tiny rectangular plastic box, was found useful as a detector coil in place of the self-made coil. Contrary to the Cellular Phone calling Detector circuit, a high sensitivity is not required here in order to avoid false triggering of the relay.
Place the cell-phone in close contact with L1.

Temperature-controlled Fan


Parts:

P1_____________22K Linear Potentiometer (See Notes)

R1_____________15K @ 20°C n.t.c. Thermistor (See Notes)
R2____________100K 1/4W Resistor
R3,R6__________10K 1/4W Resistors
R4,R5__________22K 1/4W Resistors
R7____________100R 1/4W Resistor
R8____________470R 1/4W Resistor
R9_____________33K 4W Resistor

C1_____________10nF 63V Polyester Capacitor

D1________BZX79C18 18V 500mW Zener Diode
D2_________TIC106D 400V 5A SCR
D3-D6_______1N4007 1000V 1A Diodes

Q1,Q2________BC327 45V 800mA PNP Transistors
Q3___________BC337 45V 800mA NPN Transistor

SK1__________Female Mains socket

PL1__________Male Mains plug & cable
Device purpose:
This circuit adopt a rather old design technique as its purpose is to vary the speed of a fan related to temperature with a minimum parts counting and avoiding the use of special-purpose ICs, often difficult to obtain.

Circuit operation:
R3-R4 and P1-R1 are wired as a Wheatstone bridge in which R3-R4 generate a fixed two-thirds-supply "reference" voltage, P1-R1 generate a temperature-sensitive "variable" voltage, and Q1 is used as a bridge balance detector.
P1 is adjusted so that the "reference" and "variable" voltages are equal at a temperature just below the required trigger value, and under this condition Q1 Base and Emitter are at equal voltages and Q1 is cut off. When the R1 temperature goes above this "balance" value the P1-R1 voltage falls below the "reference" value, so Q1 becomes forward biased, pulse-charging C1.
This occurs because the whole circuit is supplied by a 100Hz half-wave voltage obtained from mains supply by means of D3-D6 diode bridge without a smoothing capacitor and fixed to 18V by R9 and Zener diode D1. Therefore the 18V supply of the circuit is not true DC but has a rather trapezoidal shape. C1 provides a variable phase-delay pulse-train related to temperature and synchronous with the mains supply "zero voltage" point of each half cycle, thus producing minimal switching RFI from the SCR. Q2 and Q3 form a trigger device, generating a short pulse suitable to drive the SCR.

Notes:
The circuit is designed for 230Vac operation. If your ac mains is rated at about 115V, you can change R9 value to 15K 2W. No other changes are required.
Circuit operation can be reversed, i.e. the fan increases its speed as temperature decreases, by simply transposing R1 and P1 positions. This mode of operation is useful in controlling a hot air flux, e.g. using heaters.
Thermistor value is not critical: I tried also 10K and 22K with good results.
In this circuit, if R1 and Q1 are not mounted in the same environment, the precise trigger points are subject to slight variation with changes in Q1 temperature, due to the temperature dependence of its Base-Emitter junction characteristics. This circuit is thus not suitable for use in precision applications, unless Q1 and R1 operate at equal temperatures.
The temperature / speed-increase ratio can be varied changing C1 value. The lower the C1 value the steeper the temperature / speed-increase ratio curve and vice-versa.
Warning! The circuit is connected to 230Vac mains, then some parts in the circuit board are subjected to lethal potential! Avoid touching the circuit when plugged and enclose it in a plastic box.

Monday, February 21, 2011

Plant Watering Watcher




Parts:

R1,R4________470K 1/4W Resistors
R2____________47K 1/2W Trimmer Cermet or Carbon
R3___________100K 1/4W Resistor
R5_____________3K3 1/4W Resistor
R6____________15K 1/4W Resistor
R7___________100R 1/4W Resistor

C1_____________1nF 63V Polyester Capacitor
C2___________330nF 63V Polyester Capacitor
C3,C4_________10µF 25V Electrolytic Capacitors

D1__________1N4148 75V 150mA Diode
D2_____________5mm. Red LED

IC1___________4093 Quad 2 input Schmitt NAND Gate IC

Q1___________BC557 45V 100mA PNP Transistor

P1,P2_______Probes (See Notes)

B1______________3V Battery (2xAA, N or AAA 1.5V Cells in series)
Device purpose:
This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turning off when the moisture level is increasing. Adjusting R2 will allow the user to adapt the sensitivity of the circuit for different grounds, pots and probe types.

Improvements:
This little gadget encountered a long lasting success amongst electronics enthusiasts since its first appearance on this website in 1999. Nevertheless, in the correspondence exchanged during all these years with many amateurs, some suggestions and also criticism prompted me to revise thoroughly the circuit, making some improvements requiring the addition of four resistors, two capacitors and one transistor.
This resulted in a more stable and easy to setup device, featuring a more visible flashing indicator with no resort to ultra bright LED devices.
Extensive tests were also carried out with different flower-pots and probes. Although, as can be easily imagined, differences from various pots and probe types proved to be exceedingly high, typical resistance values across two 60mm long probes driven fully into the pot's ground about 50mm apart measured around 500 to 1000 Ohm with a high water content and about 3000 - 5000 Ohm when the ground was dry.

Circuit operation:
IC1A and related components R1 and C1 form a 2KHz square wave oscillator feeding one gate input of IC1B through the voltage divider R2/R3 made variable by adjusting the Trimmer R2. If the resistance across the probes is low (as when there is a sufficient quantity of water into the pot) C2 diverts the square wave to ground, IC1B is blocked and its output will go steady hight. IC1C inverts the high status to low, thus keeping IC1D blocked: the LED is off.
When the ground in the flower-pot is becoming too dry the resistance across the probes will increase and C2 will be no longer able to divert the square wave to ground. Therefore, IC1B output begins to transfer the 2kHz signal to IC1C which, in turn, passes it to the oscillator built around IC1D.
No longer disabled by a low level on its input, the IC1D oscillator slowly pulses Q1 base low causing the LED to flash, signalling the necessity to water the plant.
The short low pulse driving the base of Q1 is actually a burst of 2kHz pulses and therefore the LED flickers about 2,000 times per second - appearing to the human eye as if the LED was steadily on for the entire duration of the pulse.

Notes:
A square wave is used to avoid problems of probes oxidization.
Probes are made with two pieces of bare, stiff lighting cable of 1mm diameter and should be about 60mm long.
The probes should be driven fully in the pot's ground about 30 - 50mm apart. Please note that all parameters regarding probes material, dimensions and spacing are not critical.
Current consumption: LED off = 150µA; LED on = 3mA for 0.1 sec. every about 2 sec. allowing the battery to last for years.
The quiescent current consumption is so low that the use of a power on/off switch was considered unnecessary. In any case, to switch the circuit completely off, you can short the probes.

Fridge door Alarm


Parts:

R1____________10K 1/4W Resistor
R2___________Photo resistor (any type)
R3,R4________100K 1/4W Resistors

C1____________10nF 63V Polyester Capacitor
C2___________100µF 25V Electrolytic Capacitor

D1,D2_______1N4148 75V 150mA Diodes

IC1___________4060 14 stage ripple counter and oscillator IC

Q1___________BC337 45V 800mA NPN Transistor

BZ1__________Piezo sounder (incorporating 3KHz oscillator)

SW1__________Miniature SPST slide Switch

B1___________3V Battery (2 AA 1.5V Cells in series)
Circuit operation:
This circuit, enclosed into a small box, is placed in the fridge near the lamp (if any) or the opening. With the door closed the interior of the fridge is in the dark, the photo resistor R2 presents a high resistance (>200K) thus clamping IC1 by holding pin 12 high. When a beam of light enters from the opening, or the fridge lamp illuminates, the photo resistor lowers its resistance (<2K), pin 12 goes low, IC1 starts counting and, after a preset delay (20 seconds in this case) the piezo sounder beeps for 20 sec. then stops for the same lapse of time and the cycle repeats until the fridge door closes. D2 connected to pin 6 of IC1 allows the piezo sounder beeping 3 times per second.

Notes:
Connecting D1 to pin 2 of IC1 will halve the delay time.
Delay time can be varied changing C1 and/or R3 values.
Any photo resistor type should work.
Quiescent current drawing is negligible, so SW1 can be omitted.
Place the circuit near the lamp and take it away when defrosting, to avoid circuit damage due to excessive moisture.
Do not put this device in the freezer.

Smart Trailing Socket


Parts:

R1,R2_________100R 1/2W Resistors

C1____________100nF 630V Polyester Capacitor

D1 to D6_____1N5408 1000V 3A Diodes (See Notes)
D7__________TIC225M 600V 8A Sensitive Gate Triac (See Notes)

A commercial trailing socket to be modified or a self-made box with several sockets.
Comments:
This circuit consists of a Trailing Socket (also called Extension or Distribution Socket) or similar device where two, three or more sockets (depending on the box dimensions and on constructor's needs) will be powered only when a current flows in the Control Socket.
For example: if an electric drill is connected to the Control Socket, the Switched Sockets will be powered each time the electric drill is running. In this case, a lamp could be connected to a Switched Socket and will illuminate when the drill is operating.
Another example: a desk lamp could be connected to the Control Socket and a PC, a Monitor and a Printer could be connected to the Switched Sockets and will be running after the lamp is switched on. Switching off the lamp, all the above mentioned appliances will be automatically switched off.
A further application is the control of a High Fidelity chain, plugging the Power Amplifier in the Control Socket and - for example - CD Player, Tape Recorder, and Tuner in the Switched Sockets. Usually, trailing sockets are placed to the rear of the appliances, often in places not easily reachable, so, even if the socket has a switch, it is much easier to switch on and off the High Fidelity chain from the main amplifier itself.
The same consideration is valid for computer-monitor-printer chains etc. Nevertheless, in this case, the use of a table lamp plugged in the Control Socket is almost mandatory, as explained below.
In fact, this very sensitive circuit works fine when appliances having full breaking switches like lamps, drills, most power amplifiers, old radios, old TV sets, fans, almost all electrical household appliances etc. are plugged in the Control Socket. This is because these devices have a switch that fully excludes the internal circuitry from the mains.
Unfortunately, in modern devices like computers, monitors, CD players, recent radios and TV sets (usually powered by means of internal "switching" supplies), the power switch does not completely isolate the internal circuitry from the mains, as transient suppressors and other components remain on circuit. This causes a very small current to flow across the sensing circuitry, but sufficient to trigger the output Triac.
Therefore, the switched devices will remain always on, no matter if the control appliance is on or off. This could also happen when devices connected to the mains by means of plug-in power supply adapters are used as control appliances, due to their lack of a mains switch.
In spite of this restriction, the circuit can be still useful, due to the high number and variety of devices allowing impeccable performance when they are plugged in the Control Socket.

Circuit operation:
Six back-to-back power diodes are connected in series to the Control Socket. The current drawn by the device plugged into this socket when in the on state, flowing through the diode chain, causes a voltage drop of about 2V. This voltage, limited by R1, drives the Gate of the Triac D7 which, in turn, will switch the output sockets.
C1 and R2 form a so called "Snubber network", helping to eliminate switching transients generated by inductive loads.

Notes:
The circuit is sufficiently small to be embedded into some types of commercial trailing sockets, or a box with a number of sockets can be made at will.
The diode types suggested in the Parts List for D1 to D6 will allow an appliance of up to about 500W power to be plugged in the Control Socket. Use BY550-800 diodes for up to 800 - 1000W.
For less demanding appliances, 1N4007 diodes will allow up to 200W power.
The Triac type suggested in the Parts List for D7 will allow a total power available to the Switched Sockets of more than 1000W. If you intend to drive loads of more than 500W total, please use a suitable heatsink.
Wanting to drive less powerful loads, you can use for D7 a TIC216M (up to 800 - 1000W) or a TIC206M (up to 500 - 600W).
Warning! The device is connected to 230Vac mains, so some parts in the circuit board are subjected to lethal potential! Avoid touching the circuit when the mains cord is plugged in!

Aye Zindagi Fariha Pervaiz

UNLICENSED MOBILE ACCESS/GENERIC ACCESS NETWORK: Possible Impact in Pakistan to Provide Cost-Effective 3G Solution: Syed Bilal Raza Tirmizi



ABSTRACT:

The popularity of wireless communication systems can be seen almost every where in the form of cellular networks, WLANs, and WPANs. In addition small portable devices have been increasingly equipped with the multiple communication interfaces building a heterogeneous environment in terms of access technologies. This has motivated researchers to integrate various wireless platforms such as cellular networks, WLANs etc. The desired ubiquitous computing environment of the future has to exploit this multitude of connectivity alternatives resulting from diverse wireless communication systems and different access technologies to provide useful services with guaranteed quality to users. The research presented in this paper explores the concept of Unlicensed Mobile Access (UMA)/Generic Access Networks (GAN) and its possible impact, its economic and commercial feasibility for both the service providers and the consumers and proposed suggestions and finally it discuss the cellular operators’ approach for the deployment of 3G in Pakistan.

1. INTRODUCTION:

UMA/GAN is 3rd generation partnership project (3GPP) [1] global standard for subscribers access to mobile circuit, packet and IP Multimedia Subsystem (IMS)-based services over an IP-based access network, including the internet. With UMA/GAN, mobile operators can now leverage the cost and performance advantages of IP access technologies (DSL, Cable, Wi-Fi…) to deliver high-quality, low-cost mobile voice and data services in the location where subscriber spend most of their time at the home and office [2].
The local network may be based on private unlicensed spectrum technologies like Bluetooth or 802.11, while the wide network is alternatively GSM/GPRS or UMTS mobile services. On the cellular network, the mobile handset communicates over the air with a Base station, through a Base Station Controller to servers in the core network of the carrier. Under the UMA/GAN system, when the handset detects a LAN, it establishes a secure IP connection through a gateway to a server called a UMA/GAN controller on the carrier network. The architecture of UMA/GAN is shown in FIGURE 1.


The UMA/GAN controller translates the signals coming from the handset to make it appear to be coming from another Base Station. Thus, when a mobile moves from a GSM to an 802.11 network it appears to the core network as if it is simply on a different BTS [4].

2. AVAILABLE TECHNOLOGIES AND CELLULAR GROWTH IN PAKISTAN:

Pakistan has seen major and rapid technological advancements in recent years in IT and telecom sector with 58.8% teledensity having growth of 30.6% [5]. At present wireless and cellular technologies available in Pakistan are GSM, GPRS, EDGE, CDMA2000, Wi-Fi [6] and Wimax [6]. Pakistan has been one of the fastest growing mobile markets among the emerging telecom markets. Subscription of subscribers remained impressive throughout and all companies together added more than 25 million subscribers to their networks. Total subscribers crossed 88 million at the end of 2007-08 [5]. At present there are more than 90 million cellular subscribers in Pakistan.

3. UMA/GAN’s POSSIBLE IMPACT IN PAKISTAN:

The world is in the middle of the economic crises and Pakistan has also faced the economic problems due to the problems in the South Asian region. The economy registered a growth of 5.8% in 2008 against the target of 7.2% [5]. In relation to slow economic growth the telecom sector also exhibited slow growth trend. While companies finding difficult to maintain and enhance existing networks, UMA/GAN can play a role in not only in maintaining the network but can also help in extending the services specially to those areas where quality of service is not good for any reasons or to very thinly populated areas where installing Base Stations are not good economical and commercially feasible option. UMA/GAN offers benefits for both the operators and consumers simultaneously and can play a major role in future developments in telecom industry along with other 3G technologies. Some of the advantages of UMA/GAN for service providers are:
• Instead of erecting expensive base stations to cover every nook and cranny of a neighborhood, GAN allows carriers to add coverage using low cost 802.11 access points. When at home, subscribers have very good coverage.
• In addition, GAN relieves congestion on the GSM or UMTS spectrum by removing
common types of calls and routing them to the operator via the relatively low cost Internet.
• GAN makes sense for network operators that also offer internet services. Operators can leverage sales of one to promote the other, and can bill both to each customer.
• At the same time UMA/GAN also offers economic & quality of service based benefit to Customer which can focus the thinly populated or highly congested areas for converge and quality of service to the customers of average income base in Pakistan especially small towns and remote villages.
UMA/GAN offered benefits to subscribers are:
• Subscribers do not rely on their operator’s ability to roll out towers and coverage,
allowing them to fix some type of coverage black spot themselves (such as in home or office).
• The cheaper rates of 802.11 use, coupled with better coverage at home, make it more affordable and practical to use cell phones instead of landlines.
• UMA/GAN is the only technology available that combines GSM and 802.11 into a Service that uses a single number, a single handset, single set of services and single phone directory for all calls [7].

4. PAKISTAN’S APPROACH AND PROPOSED SUGGESTIONS:

Pakistan now has a higher concentration of cellular networks with amazing services like GPRS, voice and message services at competitive rates besides multimedia messages and much more. But, all that probably is nothing compared to what has been brewing in the cellular sector. Cellular giants are preparing to spice things up under a single roof, with 3G. According to Telenor, Pakistan” Time for 3G is now” [8]. Echoing along similar lines Ufone also saw time ripe for 3G. Ufone was the view that broadband market had witnessed a significant growth in last 12 months, crossing 200,000 subscribers with the launch of wireless broadband service [8]. With WCDMA and UMTS [9] are other emerging technologies one of the reasons to prefer UMA/GAN over WCDMA or UMTS is that the introduction of UMA/GAN by a network operator is relatively low cost and straight forward. While WCDMA and UMTS requires relatively expensive and complicated backhaul circuits as well as costly Base Stations. The estimated cost of UMTS, GSM and UMA/GAN for covering approximately 20 to 30 Km

Also UMTS deployment has two main limitations with regards to its capability to deliver cost effective high speed mobile broadband, (1) its relatively poor in-building penetration and (2) its limited coverage capability compared to lower frequencies [10]. Whereas UMA/GAN only requires the users to additionally utilize their existing broadband connections. Also UMA/GAN is compatible with UMTS, so future deployment and extension of UMTS network will be relatively cheaper with better indoor coverage [11]. With cellular companies currently focusing on investing in remote areas to connect un-served people, UMA/GAN can be the proper solution.

5. CONCLUSION:

If WLAN access support to existing service set is in focus e.g. for home zone tariffs, or better indoor coverage, then UMA/GAN is the perfect match. UMA/GAN is an access near solution with no impact on offer services. With telecom and cellular industry evolving so rapidly, 3G in Pakistan is not a distant dream. The issues like integration of existing 2.5g (GSM) network with 3G networks can duly addressed by UMA/GAN as its is compatible with GSM. Cellular operators in Pakistan can adapt this technology to enhancing their networks to 3G without replacing the existing infrastructure and also can extend their network coverage including very remote and far areas with avoiding the costly BTS installations. With UMA/GAN, a low cost and commercially acceptable deployment of 2G/3G networks is possible.

REFERENCES:

[1] www.3gpp.org
[2] “Kineto Wireless” press release 7th February 2006
[3] “Norsk UMTS-forum” 24th Jan 2007 by ERICSSON
[4] “Issues in integrating cellular networks, WLANs and MANETs: A futuristic Heterogeneous Wireless Network” by Dave cavalcanti, Dharma Agarwal, University of Cincinnati. Carlos Cardeiro, Philips Research USA. Bin Xie & Anup Kumar, University of Louisville.
[5] Annual Report 2008 by Pakistan Telecommunication Authority
[6] IEEE standards (802.11 & 802.16)
[7] www.umatechnology.org
[8] “Flare Magazine” Mar-Apr 2009 Issue
[9] www.UMTSforum.org
[10] Position Paper UMTS/HSXPA by Motorola Inc
[11] “Generic & Open Media Access for Next Generation Wireless Networks: A case study” by Mahesh Sooriyabandara, Member IEEE

Sunday, February 20, 2011

Aik Alif by Sain Zahoor

Mera Naam Hai Mohabbat OST Indus Vision

ATIF ASLAM BEST SONG EVER (COKE STUDIO)

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The Art of Communication

Celebrities are constantly telling parents to talk to their kids about the issue of the day. But, what celebrities don't tell you is how to talk to your kids.

Clinical psychologist Erik Fisher, Ph.D, says that communication between parent and child is crucial to a child's sense of safety, trust, self-esteem and power. But as children enter high school and become more self-sufficient, communication can be tough. In Fisher's book “The Art of Empowered Parenting” he gives these guidelines for better communication:

Realize the power of “No.” It's one of the smallest words in our language, but it can be harmful when not used properly. “When a child hears 'No's from his parents, it can set a negative frame of reference for how the child feels about himself, his parents, and the world,” Fisher says. Instead, parents should try, whenever possible, to use the word “Yes” and reframe the situation to look at other options that won’t leave your teen feeling shut down.

Avoid criticism. Although most of the time parents do it to help their teens improve, it can also lead to feelings of shame, embarrassment and inadequacy. When giving feedback, open the conversation with phrases like “I'm not sure if you have considered X, Y, or Z in this situation and I would like to hear your thoughts” or “I would like to talk about what happened at school today.” Avoid commands and put-downs.

Don't lecture. It's not a communication tool, it's a power trip. Don't cut your teen out of the conversation. Short and to-the-point communication which leads to brainstorming possible solutions is the way to go. Also, add in a bit of humor, where appropriate, and don't be afraid to point out your own past mistakes as examples, as your teen gets older.
The Family Meeting. This can be a great ice-breaker for families. Everyone in the family should attend and everyone should get equal time to speak without interruption. Consider setting guidelines, and a short and sweet agenda. Always try to end the meeting on a positive note.

Building Trust. Sometimes parents can communicate distrust without even realizing it, like when you finish your teen's sentence. Ask your teen straight up how he feels about himself, or about situations in his life and the life of his peers. This will not only help his self-awareness, but will also tell him that his parent is really listening.

The Power of Praise. It can be as simple as telling your teen how much fun he is to be around. But it's important to consider how praise is communicated. Saying, “You did a wonderful job, and I love you for that” could imply that you only love your teen when he does a wonderful job. Keep in mind that compliments aren't just for wonderful displays of talent, they're also important to give when your child puts in a good effort.

So, next time you get the urge to talk to your teen about sex, drugs and rock 'n roll remember this: stay positive, keep it short, give them your undivided attention and don't be afraid to talk a little about the things that they do right. Even with parents and teens, communication should be a two-way street.

Battle-hardened Afridi the lynchpin---(Saad Shafqat)


Pakistan are coming to the World Cup on a turbulent trajectory. One of the original hosts, they were stripped of those rights following the terror attack in Lahore last year. In addition, the team has been hobbling from a series of mishaps, the latest and potentially most damaging of which is the spot-fixing scandal that has resulted in lengthy bans against three vital players. This turmoil makes the opening clash against Kenya an almost ideal start for them, offering a chance to settle jitters against an unrated opponent.

Fortunately for Pakistan, their cricket has gathered some momentum through the current season: two drawn Tests and a narrowly conceded five-match ODI series against South Africa, followed by decisive Test and ODI series wins in New Zealand that represent Pakistan's first serious overseas accomplishment in half a decade.

They are a team in transition, with seasoned veterans such as Younis Khan, Misbah-ul-Haq, and Abdul Razzaq, as well as bright young talent - players like Umar Akmal and Asad Shafiq. In Shahid Afridi they have an experienced and battle-hardened leader. Nevertheless, a brittle batting line-up and inconsistent fielding - Pakistan's traditional weaknesses - continue to plague the team. The opening pair hasn't been settled in years, and we can expect to see rotation in those slots, especially if there is an early loss or two.

Bowling is usually Pakistan's strongest asset, but they are missing two world-class seamers, Mohammad Amir and Mohammad Asif, who have been sidelined by the spot-fixing mess. Umar Gul will spearhead the attack and should have capable back-up in the form of newcomer Wahab Riaz, although the third seamer's role expected to be variably served by Razzaq, Shoaib Akhtar or the unknown Junaid Khan is a potential weak link that will have to be offset by the trusted legspin-offspin combination of Afridi and Saeed Ajmal.

World Cup pedigree
Pakistan's previous World Cup finishes include three semi-finals, a final and a title, but those are distant memories. Their last two appearances were both preliminary-round exits, and the 2007 outing, especially, was a nightmare, when Ireland beat them and their coach, Bob Woolmer, was found dead the next morning. Even the 1999 World Cup, when they did very well and made the final, is a bitter memory because of the way the team eventually capitulated to Australia. And 1996, too, left an acrid taste after a quarter-final loss to arch-rivals India. You really have to go back to 1992 to find a World Cup tournament that resonates with Pakistani fans.

Recent form
For most of 2010, Pakistan had a dismal win-loss ratio placing them at the bottom of the international pile, worse even than Zimbabwe. They began the year with a 0-5 drubbing at the hands of Australia, followed by two key defeats (to India and Sri Lanka) in the Asia Cup in June. Later in the year, however, they picked themselves up. Although two subsequent encounters (against England and South Africa) were lost, Pakistan were able to push each series to a fifth-game decider, before finally notching a 3-2 series win in New Zealand. Their win-loss ratio over the last 12 months now places them sixth, ahead of West Indies, New Zealand, Bangladesh and Zimbabwe.

Expert eye
Javed Miandad: Pakistan are a talented team fully capable of pulling off a surprise. In the 2011 format, a team only has to edge past the bottom three in its group and they are in the quarter-final, from where it is just three straight wins to the title. Any of the eight frontline teams can win this one.

Where they're likely to finish
Given Pakistan's well-earned reputation for volatility, they are an interesting bet for this tournament. It goes in their favour that the World Cup often goes to a team who start out as dark horses. On paper you would expect them to get past the group stage but succumb in the quarters to lack of confidence and the wild card of controversy. But Pakistan have a history of firing best when cornered, so anything can happen. Only a fool would rule them out.

Watchability
The brand of cricket played by Pakistan is nothing if not exciting. Their onslaughts can be murderous and their rearguards stirring. Even their collapses and surrenders are spectacular. This is a team that offers the cricket enthusiast potentially everything, from established crowd-pullers to thrilling young blood, from delight and elation to tragedy and pathos, in a package liberally spiced with scandal and gossip.

Key stats
Umar Akmal and Shahid Afridi have been the side's leading batsmen since December 2009. Afridi scored two centuries in the Asia Cup, including a superb 109 off 76 balls in a defeat against Sri Lanka; Saeed Ajmal (17 wickets) and Afridi (19) have been the best bowlers in that period. Umar Gul was in superb form last summer in England, picking up 12 wickets in the five matches, and is by far Pakistan's best limited-overs pace bowler.

Players in focus
For a player of his limited-overs stature and with his nose for the big moment, Shahid Afridi is long overdue a World Cup mega-performance. In 2009, when Pakistan took the World Twenty20 title in England, it was on the strength of his feats. An ambitious man conscious of honours and awards, he will be keen to add World Cup glory to this legacy. Now that he is captain the stakes are that much higher. He is Pakistan's lynchpin, and if he finds form, everybody better watch out. The subcontinental conditions will certainly suit him.

When Umar Akmal gets going, he evokes comparison with hallowed names. With a superb eye and a gift for timing, he is a breathtaking talent. Although his natural impetuosity has rendered him an underachiever in Tests, the same quality is a potential asset in ODIs. He can be particularly skilled at exploiting Powerplays, and his presence adds great pep to Pakistan's batting. The only real drawback is his tendency to throw his wicket away; not quite as bad as with Afridi, but it's there. If he can somehow discover his powers of concentration and curb this self-destructive instinct, Pakistan will be formidable.

Umar Gul is the best bowler in Pakistan's attack, and will shoulder the responsibility for early breakthroughs as well the death overs. He has the pace, precision and experience to prove decisive in both segments. Although a proven match-winner, he is prone to injury - more than is usual for fast bowlers. His fitness is probably going to be Pakistan's biggest worry. Perhaps his most effective weapon is his ability to hold his nerve. He may stare and glare and get into verbal jousts, but in the pure contest between bat and ball, don't expect him to blink first.

Warne mesmerises in classic The greatest World Cup match, and it was a pudgy blond who shone brightest Jamie Alter


Shane Warne
4 for 29 v South Africa, semi-final, 1999

Generations of grandkids will know of the greatest one-day match of all, and of the man who scripted it. It's the stuff of folklore: the bizarre last over, with the two boundaries hammered by Lance Klusener, the inexplicable mix-up with Allan Donald, the scores tied. But without a doubt, every soul who was at Birmingham that lovely day will say it was a pudgy blond's day.

Five months after a return from shoulder injury, Shane Warne bowled a spell uncannily reminiscent of the semi-finals of the 1996 World Cup, when victory had threatened to slip out of Australia's reach. South Africa, chasing 213 to walk into their first such final, were 43 for 0, with Herschelle Gibbs and Gary Kirsten looking good. Enter Warne.

With the second ball of his second over, he ambled in, tongue protruding. Eyes fixed firmly on Gibbs, he unleashed a beauty. It was mesmerising to watch live at the ground - it looped up, drifted away, landed in the rough outside leg stump, and fizzed past a dumbfounded Gibbs to clip off. The ball of Warne's ODI career. As canary-yellow bodies swooped in and embraced the red-faced bowler, the batsman stood in disbelief, refusing to acknowledge that he had been bowled.

Five deliveries later Warne floated another one up in the footmarks outside leg, Kirsten went down to sweep, missed and the ball hit off again. As he let out a war cry heard all the way back in Ferntree Gully, Warne was a sight to behold. Hansie Cronje lasted just two deliveries, as an attempted flick to the on side went to first slip - replays suggested there was no edge - and Warne had three wickets in eight balls.

Warne was taken off after eight overs, but every South African knew that he'd be back for 12 deliveries. The 43rd over was a quiet affair, but in Warne's final one, Shaun Pollock slammed a six and a four before stealing a single into the covers to bring Jacques Kallis, on 53 from 91 balls, on strike.

Warne tossed it up, Kallis checked his drive and sliced straight into the waiting hands of Waugh at cover. A spell of 4 for 29 had been completed. Warne's captivating display inspired his flagging team-mates, changing the mood in a way that only born champions could.

Saturday, February 19, 2011

Ijazat Title Song (Complete Song)

OsT - Talluq

OST NAJIA "Kyun Itna Yaad" For HUM TV Sung By Alisha Chinai

ham keh Thehre ajnabii itnii madaaraatoN - nayyara noor

Aey jazba dil gher main chahoon

kabhii ham Khuubsuurat thay - nayyara noor

Zero Point

Daily Express News Story

raat yuun dil me.n terii kho'ii huu'ii yaad - nayyara noor

Takta hay teri soorat har aik tamashai

Mujha Apna Zabt

Nayara Noor : Qissa e dard

har cha.nd sahaaraa hai tere payaar ka dil - nayyara noor

Nayyara Noor Roothe Ho Tum Ko kaise manaoon Robin Ghosh روٹھے ھو تم ـ نی...

Ae Ishq hamein Barbaad Na kar (Nayyara Noor)

Paani Jeisa Pyaar- OST ( Humtv )

OsT - Meri Zaat Zarra-e-Benishan

" Tum Kaise Mohabbat Karte Ho "

Friday, February 18, 2011

Fiber Optics Basics

Fiber optic technology is simply the use of light to transmit data. The
general use of fiber optics did not begin until the 1970s. Robert Maurer of
Corning Glass Works developed a fiber with a loss of 20 dB/km,
promoting the commercial use of fiber. Since that time the use of fiber
optics has increased dramatically. Advances in fiber technology, lower
production costs, and installation have all contributed to the wide use of
fiber.
The purpose of this paper is to provide an overview of fiber, its
construction, and functionality.
The heaviest use of fiber is in the telecommunications industry. Telephone
companies initially used fiber to transport high volumes of voice traffic
between central office locations. During the 1980s telephone companies
began to deploy fiber throughout their networks. Fiber technology allows
companies to "future proof" networks. We use the phrase "future proof"
because fiber is theoretically unlimited in bandwidth. Bandwidth is a
measurement of the data carrying capacity of the media (in this case,
fiber). The greater the bandwidth, the more data or information that can
be transmitted. Copper has a bandwidth and a distance limitation,
making it less desirable.
Benefits of fiber include:
„ High bandwidth for voice, video and data applications
„ Optical fiber can carry thousands of times more information than
copper wire. For example, a single-strand fiber strand could carry all
the telephone conversations in the United States at peak hour
„ Fiber is more lightweight than copper. Copper cable equals
approximately 80 lbs./1000 feet while fiber weighs about 9
lbs./1000 feet
„ Low loss. The higher frequency, the greater the signal loss using
copper cabling. With fiber, the signal loss is the same across
frequencies, except at the very highest frequencies
„ Reliability - Fiber is more reliable than copper and has a longer life
span
„ Secure - Fiber does not emit electromagnetic interference and is
difficult to tap
Optical fiber is composed of several elements. The construction of a fiber
optic cable consists of a core, cladding, coating buffer, strength member
and outer jacket. The optic core is the light-carrying element at the center.
The core is usually made up of a combination of silica and germania.
The cladding surrounding the core is made of pure silica. The cladding
has a slightly lower index of refraction than the core. The lower refractive
index causes the light in the core to reflect off the cladding and stay
within the core.
Index of refraction is the ratio of the velocity of light in a vacuum to the
velocity of light in a material. The speed of light in a vacuum is equal to
300,000,000 meters per second.The higher the index of refraction, the
slower the speed of light through the material.
Index of Refraction = Light velocity (vacuum)
Light velocity (material)
For example:
Air = 300,000,000 meters/second
IR = 1
Glass = 200,000,000 meters/second
IR = 1.5
Fiber is either single mode or multimode. Fiber sizes are expressed by
using two numbers: 8/125. The first number refers to the core size in
microns. The second number refers to the core size plus the cladding size
combined

Thursday, February 17, 2011

UMA Overview

Unlicensed Mobile Access (UMA) technology provides access to GSM and GPRS mobile services over unlicensed spectrum technologies, including Bluetooth and 802.11. By deploying UMA technology, service providers can enable subscribers to roam and handover between cellular networks and public and private unlicensed wireless networks using dual-mode mobile handsets. With UMA, subscribers receive a consistent user experience for their mobile voice and data services as they transition between networks.

In order to promote the widespread adoption of UMA technology, a number of leading companies within the wireless industry have jointly developed a set of open specifications. These specifications are available through this Web site, and may be used by vendors and carriers of wireless communications systems and applications to develop and deploy interoperable solutions.

In addition to developing and maintaining the initial specifications, the participating companies are actively working with the 3GPP standards organization to use the specifications as the basis for the development of a formal standard.

How UMA Technology Works
A mobile subscriber with a UMA-enabled, dual-mode handset moves within range of an unlicensed wireless network to which the handset is allowed to connect.
Upon connecting, the handset contacts the UMA Network Controller (UNC) over the broadband IP access network to be authenticated and authorized to access GSM voice and GPRS data services via the unlicensed wireless network.
If approved, the subscriber’s current location information stored in the core network is updated, and from that point on all mobile voice and data traffic is routed to the handset via the Unlicensed Mobile Access Network (UMAN) rather than the cellular radio access network (RAN).
ROAMING: When a UMA-enabled subscriber moves outside the range of an unlicensed wireless network to which they are connected, the UNC and handset facilitate roaming back to the licensed outdoor network. This roaming process is completely transparent to the subscriber.
HANDOVER: If a subscriber is on an active GSM voice call or GPRS data session when they come within range (or out of range) of an unlicensed wireless network, that voice call or data session can automatically handover between access networks with no discernable service interruption. Handovers are completely transparent to the subscriber.

Telecommunications engineering

Telecommunications engineering or telecom engineering is a major field within Electronic engineering. The work ranges from basic circuit design to strategic mass developments. A telecommunication engineer is responsible for designing and overseeing the installation of telecommunications equipment and facilities, such as complex electronic switching systems, copper telephone facilities, and fiber optics. Telecom engineering also overlaps heavily with broadcast engineering.
Telecommunication is a diverse field of engineering including electronics, civil, structural, and electrical engineering as well as being a political and social ambassador, a little bit of accounting and a lot of project management. Ultimately, telecom engineers are responsible for providing the method that customers can get telephone and high speed data services.
Telecom engineers use a variety of different equipment and transport media available from a multitude of manufacturers to design the telecom network infrastructure. The most common media, often referred to as plant in the telecom industry, used by telecommunications companies today are copper, coaxial cable, fiber, and radio.
Telecom engineers are often expected, as most engineers are, to provide the best solution possible for the lowest cost to the company. This often leads to creative solutions to problems that often would have been designed differently without the budget constraints dictated by modern society. In the earlier days of the telecom industry massive amounts of cable were placed that were never used or have been replaced by modern technology such as fiber optic cable and digital multiplexing techniques.
Telecom engineers are also responsible for keeping the records of the companies’ equipment and facilities and assigning appropriate accounting codes for purposes of taxes and maintenance. As telecom engineers responsible for budgeting and overseeing projects and keeping records of equipment, facilities and plant the telecom engineer is not only an engineer but an accounting assistant or bookkeeper (if not an accountant) and a project manager as well.
This article provides an overview of the major field, telecommunications engineering. Readers might be interested to have a look at electronic engineering and broadcast engineering which are heavily related to telecommunications engineering and often taught together in different academic institutes.

Sunday, January 30, 2011

What is Knowledge

•Objective:-

1:- What is Knowledge?
2:- Who owns it?
3:- How can it be best be "Taught" or "Transmitted"

1:- What is "Knowledge"?

• Knowledge is a human ability and not an object’s aspect, as for example, a book. Its transmission involves an intellectual process of education and learning. To transmit information is easy, more than to transmit knowledge. This entails that when we talk about knowledge managing, we mean that we help people to carry out this activity.

• Knowledge has no value if it remains static. It only generates value while moving, that is to say, when it’s being transmitted or converted.

• Knowledge generates knowledge through the use of reasoning or inference (both by humans and machines).

• Knowledge is structured and created; it needs the existence of rich semantic relations between abstract or material entities. A simple database, however records it has, does not constitute knowledge per se.

• Knowledge is always slave of a context. So, to its transmission is necessary that addresser (teacher) knows the context or model of the addressee’s (trainee) world.

• Knowledge can be explicit (when it can be collected, manipulated and transferred easily) or tacit. This is the case of heuristic knowledge that comes from accumulated individuals’ experience.

• Knowledge can be formalized at different levels, even being informal. The most part of verbal knowledge transferred is informal.

• Knowledge is the ability to convert data and information in effective actions.

• "Knowledge" (In the view of Genius People of World):

(i) Hazrat Muhammad Mustafa (S.A.W.W):

• We have to gain knowledge from cradle to grave.

(ii) Hazrat Ali Ibn-e-Imran (A.S):

•Wisdom is the noblest heritage; theoretical and practical knowledge are best marks of distinction.

•The knowledge is very superficial which remains only on your tongue; the intrinsic merit and volume of knowledge is that you act upon it.

•There are many educated people who have ruined their future on account of their ignorance of religion. Their knowledge did not prove of any avail to them.

•Your supremacy over others is proportion to extent of your knowledge and wisdom.

(iii) Alexander Pope:

• A little learning is a dangerous thing; drink deep, or taste not the Pier Ian spring: there shallow draughts intoxicate the brain, and drinking largely sobers us again.
(Probably the source of the saying, "a little knowledge is a dangerous thing)

(iv) Anais Nin:

• The possession of knowledge does not kill the sense of wonder and mystery. There is always more mystery.

(v) Bertrand Russell:

•The good life is inspired by love and guided by knowledge.

(vi) Daniel J. Boorstin:

•Knowledge is not simply another commodity. On the contrary, Knowledge is never used up. It increases by diffusion and grows by dispersion.

(vii) Dean William R. Inge:
• The aim of education is the knowledge not of fact, but of values.
(viii) Frank Herbert:
• The beginning of knowledge is the discovery of something we do not understand.
(ix) Horace Mann:
• Virtue is an angel, but she is a blind one, and must ask Knowledge to show her the pathway that leads to her goal.
(x) James Madison:
• Knowledge will forever govern ignorance; and a people who mean to be their own governors must arm themselves with the power which knowledge gives.

2:- Who owns the knowledge?

Knowledge or wisdom is really properties of a faithful follower of God, Though lost to him, get back though you may have to get them from apostates. Value of each man depends upon the knowledge and skill which he has attained. Knowledge is power. It is truth because it gives us strength. Knowledge gives us sense to live in the world. It teaches us how to deal with people and how to come on over problems. Without knowledge man is like an animal. He does not know the social and religious manner. One can live without money but it is difficult to live without knowledge. So every one should love to gain knowledge as it makes us strong able and powerful.
The human minds are receptacles of the secrets of knowledge and wisdom and best receptacle is the one which can hold the most and what it holds it can preserve and protect in the best way. Therefore, there are three kinds of people, one kind is of those learned people who are highly versed in the ethics of truth and philosophy of religion, second is the kind of those who are acquiring the above knowledge, and the third kind is that class of people who are uneducated. They follow every pretender and accept every slogan; they have neither acquired any knowledge nor have secured support of firm and rational convictions.
Knowledge is better than and superior to wealth because protects you and you have to guard wealth; because wealth decreases if you keep on spending it and knowledge increases the more you make use of it; and because what you get through wealth disappears as soon as wealth disappears, but what you achieve through knowledge will remain even after you ( science, philosophy and arts are still there in this world though scientist, philosophers and men of art have died thousands of year back). Knowledge is power and it can command obedience and following; a man of knowledge during his life time can make people obey and follow him and he is praised and venerated after his death; remember that knowledge is a ruler and wealth is its subject.
Those who amass wealth though alive yet are dead to realities of life and those who gather knowledge will remain alive through their knowledge and wisdom even after their death; though their faces may disappear from the community of living beings yet their ideas, the knowledge which they had left behind them and their memory will remain in the minds of men. The knowledge which they have acquired has made them see the realities and visualize the truth, and has instilled into them the spirit of faith and trust. The duties which were decreed as hard and sufferable by ease loving and easy going people are considered easy and bearable by them. They feel happy in the company and association of things which frighten the ignorant and uneducated. They live in this world like everybody else but their souls sour the heights of heavenly eminence. So it can be say that "One who acquires vision becomes wise, and one who attains wisdom achieves knowledge".

3:- How can it be best be "Taught" or "Transmitted"?

The word knowledge we are talking about is sufficient to be taught as compared with transmission, because we can be knowledgeable by others knowledge but we can not be wise by others wisdom. So it is clear point to explain this phenomenon that knowledge should be taught.
All schools, all colleges, have two great functions: to confer, and to conceal, valuable knowledge. The theological knowledge which they conceal cannot justly be regarded as less valuable than that which they reveal. That is, when a man is buying a basket of strawberries it can profit him to know that the bottom half of it is rotten.

Society, community, family are all conserving institutions. They try to maintain stability, and to prevent, or at least to slow down, change. But the organization of the post-capitalist society of organizations is destabilized. Because its function is to put knowledge to work -- on tools, processes, and products; on work; on knowledge itself -- it must be organized for constant change.

Types of Knowledge Transfer:-
(i) Socialization:- The very basis of sharing knowledge and experiences.
(ii) Externalization:- The process of turning tacit knowledge into explicit knowledge. The knowledge, metaphors or analogies of individuals who have already learned the processes is passed on to neophytes.
(iii) Combination:- The creation of more explicit knowledge by gathering knowledge from other organizations.
(iv) Internalization:- The process of turning explicit knowledge into tacit knowledge by becoming proficient at a process to the extent where we can develop some simpler methods of achieving the same result, or achieving the result in less time.
Conclusion:-
So it is concluded that it is good to transmit knowledge but it is best to taught it because while transmitting we don't care about what is actually right or wrong. We will as it is but while teaching knowledge the pupil will other facts and realities and they will also try to find out the truth behind the world and after this they will fully aware from the heights of skies and depth of oceans.

BY: SaRa Tirmizi

Saturday, January 22, 2011

New Year--A New Beginning

“Another fresh new year is here . . .
Another year to live!
To banish worry, doubt, and fear,
To love and laugh and give!

This bright new year is given me
To live each day with zest . . .
To daily grow and try to be
My highest and my best!

I have the opportunity
Once more to right some wrongs,
To pray for peace, to plant a tree,
And sing more joyful songs!”