Uses And Abuses Internet

                                                                  USES AND ABUSES OF INTERNET

In the fast growing world of communication, internet is comparatively a new entrant but it has brought about a great revolution in the field of communication. In a very short span of time, it has linked together the whole world. In simple terms, internet means the connection of a large number of computers with one another, now, through internet, almost all the computers of the world are interconnected with one another. Seen in this context, internet has transformed the world into a global village in real terms.

Internet is replete with countless advantages. It has made possible man’s access to countless websites, informative programmers, scientific discoveries, global, political, and social, economic and cultural developments, world events and happenings, great libraries, treasures of knowledge, vast information and entertainment and much more. Then, internet is proving a low-cost source of chatting communication and exchange of ideas and information. Through internet, a student can consult great libraries and scholars, a doctor can learn about advancement is medicines and surgery; an adventurer can explore the remote comers of the world, a job seeker can observe job-advertisements and ambitious person can find his life partner also.

Unfortunately, the wrong and corrupt use of internet has also made it a great curse and nuisance. Many people use internet for vulgar chatting nude films and immoral programmers, in Pakistan, there is a mushroom growth of Net-Cafes and computer-centers where in specially designed private cabins along with young boys and girl, elderly people and small children too are seen busy in doing vulgar chatting and watching immoral programmers. This thing not only destroys their moral character but also wastes most of their precious time. Moreover, it is playing have with all our religious, social, moral and cultural values. Then, Internet is used to spread disinformation, rumors, sensational news, poisonous propaganda and computer virus. All this causes a large-scale harm. As internet has confined the people to four-walls, healthful activities like sports, games, social, gatherings, cultural activities, sharing of feelings, etc are vanishing away rapidly

Internet should only be used as a source of vast information, fast communication and positive entertainment. Its wise and proper use can make it a real blessing for one and all         

Mobile Phone

                                                                       MOBILE PHONE                                                                                                                                                                                           Mobile phone is comparatively a new addition to the already present gadgets for communication like telephone, telegraph, wireless, etc. But in a short span of time, It is getting indispensable commodity throughout the world. Like other countries of the world, it is getting popular in Pakistan day by day. Now more and more Pakistan is are using mobile phones. With the sheer rise of competition among the cellular companies, the service rates are falling down day by day and it is being predicated that by 2007, the number of subscribers will be five million is Pakistan. At present, four companies namely Mobilink, Insta, Paktel, Warid, and U-Phone are in the race while some new companies are in the offing. Latest models of mobile phones in different sizes and colure and with ever increasing functions and facilities arrive in the marker day in and day out. No doubt, present age may be called the mobile age.

In the present age of fast communication, mobile phone has totally become indispensable. Its proper and aide is no less than a blessing for us. Its ever improving services are attracting and forcing people to buy it no doubt, mobile phone and its services are expensive in Pakistan. But it is hopes that with become cheap and affordable for everyone. The government should set up mobile manufacturing units in the country to provide low-cost but durable and latest mobile sets. It should also try to assure low rate but better mobile service in the country. 

To Prepare A V-Block

                     To prepare a v-Block

Procedure:

First of all clean and lubricate all the machine.

Moves cross slide towards the column face and stop it nearest position

Clamp the work piece between the vice jaws of appropriate height over strips

Remove arbor support from over arm & arbor with great care

Adjust milling cutter nearest the column face with the help of spacing collar

During the adjustment of milling cutter decides that friction of cutting teeth towards the fix jaw

Clamp arbor support nearest the cutter

Measure the diameter of cutter and calculate R.P.M by using this formula

R.P.M=C.S*1000/3.1416*D

Calculate the feed rate by using this formula

Feed rate=No of tooth*R.P.M* feed per tooth

Set work piece for up milling

To take depth of cut and starts machine & keep a paper between running cutter & work piece then move upward slowly the machine table.

To take possible depth of cut use the feed handle after this start coolant

After the use of coolant starts auto feed

Starts machining the 1^st side and take it as reference

Then set the reference side with fixed jaw of vice & complete planning of 2^nd side

Repeats this process until the required size is obtained

Then clamp work piece in vertical position as right angle accurately

Plain both ends of work piece obtain required length using depth of cut

Remove plain milling cutter &set 90 degree angular milling cutter on the arbor

Remove the work piece from the vice and layout it

Clamp the work piece in the vice according to the layout or operation

Level the job across the milling cutter & clear the job to take a depth of cut

Start v-slot by taking the depth of cut of 1mm in each turn

In case of v-slot  in opposite side unclamped the work piece &then clamp to cut the v-slot in opposite side

Start v-slot by taking the depth of cut of 2mm in each turn &repeat it until required size

Clamp 10mm with side milling cutter after removing angular milling cutter

After clamping the work piece engraved center line

Start slotting by taking the cut of 1mm in each and repeat it upto required size

Cut the 2^nd slot as previous operation

After completing the job clear all the burrs by filling

Clean up the machine and switch of all the machine control

Prepare A Square Bar

                  

                   Prepare a Square Bar

Procedure:

First of all clean and lubricate the milling machine.

Moves cross slide towards the column and stop it nearest position.

Clamp the specimen between the vice jaws of appropriate height over the strips.

Remove arbor-support from over arm with great care.

Adjust milling cutter nearest the column face with the help of spacing collar.

During the adjustment of milling cutter decides that the direction of milling cutter (cutting teeth) towards the fix jaw.

Clamp arbor support nearest the cutter.

Measure the diameter of cutter and calculate R.P.M by using this formula…..!

R.P.M= C.S*1000/3.1416

Calculate the feed rate by using this formula given below

Feed Rate=R.P.M*No of teeth*Feed per tooth

Set the specimen for up milling

To take the depth of cut starts machine and keep a paper between running cutter

When paper slip away then stop the movement of machine table

To take the possible depth of cuts use the feed handle after this start coolant

Start machining the first side with fix jaws of vice and complete the planning of second side

Repeats this process unit the required size is obtained

Clamp specimen in vertical position at right angle accurately

Plain both sides of specimen and obtained required length using low depth of cut

Remove all the burrs by filling

Clean up all the machine and return back tool

Switch off all the machine control.