Umalis kah muna sa isipan kuh!!!!!!!!!!!!!!plz naman oh!
mag rereview pah akooh eh!!!!!!!
tapos kakatamad pah!!!!!!!!!!!! >_<
Tuesday, August 16, 2011
Tuesday, August 9, 2011
Monday, August 8, 2011
Chapter 3: Lesson 3
Chapter 3: Lesson 3
Computers are sensitive equipment that can be damaged by different factors. They can also cause health hazards to users if not treated properly.I use the computer everyday. After reading this lesson, I learned that we should take care of it very well because once a virus entered it, the whole system can be affected. We should also have good working habits and proper workstation design to be more comfortable when using the computer. The computer also have health risks so we should be careful when using it too much.
Sunday, July 31, 2011
3 idiots (SUMMARY)
Farhan Qureshi (R. Madhavan), Raju Rastogi (Sharman Joshi), and Rancchoddas "Rancho" Shyamaldas Chanchad (Aamir Khan) are three engineering students who share a room in a hostel at the Imperial College of Engineering, one of the best colleges in India. While Farhan and Raju are average students from modest backgrounds, Rancho is from a rich family. Farhan wants to become a wildlife photographer, but has joined engineering college to fulfil his father's wish. Raju on the other hand wants to uplift his family fortunes. Rancho is a wealthy genius who studies for the sheer joy of it. However, Rancho's passion is for knowledge and taking apart and building machines rather than the conventional obsession of the other students with exam ranks. With his different approach Rancho incurs the wrath of dean of college, Professor Viru Sahastrabudhhe (ViruS) (Boman Irani). Rancho irritates his lecturers by giving creative and unorthodox answers, and confronts ViruS after fellow student Joy Lobo hangs himself in his dormitory room. Joy had requested an extension on his major project on compassionate groundshis father had suffered a strokebut ViruS refused, saying that he himself was completely unmoved by his own son's accidental death after being hit by a train. Rancho denounces the rat race, dog-eat-dog, mindless rote learning mentality of the institution, blaming it for Lobo's death.
Threatened by Rancho's talent and free spirit, ViruS labels him an "idiot" and attempts on a number of occasions to destroy his friendship with Farhan and Raju, warning them and their parents to steer clear of Rancho. In contrast, ViruS model student is Chatur Ramalingam or "Silencer", (Omi Vaidya) who sees a high rank at the prestigious college as his ticket to higher social status, corporate power, and therefore wealth. Chatur conforms to the expectations of the system. Rancho humiliates Chatur, who is awarded the honour of making a speech at an award ceremony, by substituting obscenities into the text, which has been written by the librarian. As expected, Chatur mindlessly memorises the speech, without noticing that anything is amiss, partly aided by his lack of knowledge on Hindi. His speech becomes the laughing stock of the audience, infuriating the authorities in the process.
Meanwhile, Rancho also falls in love with ViruS' medical student daughter Pia (Kareena Kapoor) when he, Raju and Farhan crash her sister's wedding banquet in order to get a free meal, in the process further infuriating ViruS.
Meanwhile, the three students continue to anger ViruS, although Rancho continues to come first in every exam, while Chatur is always second, and Farhan and Raju are inevitably in the last two positions. The tensions come to a head when the three friends, who are already drunk, break into ViruS's house at night to allow Rancho to propose to Pia, and then urinate on a door inside the compound before running away when ViruS senses intruders. The next day, ViruS threatens to expel Raju lest he talks on the other two. Unable to choose between betraying his friend or letting down his family, Raju jumps out of the 3rd floor window and lands on a courtyard, but after extensive care from Pia and his roommates, awakes from a coma.
Meanwhile, the three students continue to anger ViruS, although Rancho continues to come first in every exam, while Chatur is always second, and Farhan and Raju are inevitably in the last two positions. The tensions come to a head when the three friends, who are already drunk, break into ViruS's house at night to allow Rancho to propose to Pia, and then urinate on a door inside the compound before running away when ViruS senses intruders. The next day, ViruS threatens to expel Raju lest he talks on the other two. Unable to choose between betraying his friend or letting down his family, Raju jumps out of the 3rd floor window and lands on a courtyard, but after extensive care from Pia and his roommates, awakes from a coma.
Tuesday, July 26, 2011
History of Computers
History of Computer
The first computers were people! That is, electronic computers (and the
earlier mechanical computers) were given this name because they performed
]the work that had previously been assigned to people. "Computer" was originally
a job title: it was used to describe those human beings (predominantly women)
whose job it was to perform the repetitive calculations required to compute such
things as navigational tables, tide charts, and planetary positions for astronomical
almanacs. Imagine you had a job where hour after hour, day after day, you were
to do nothing but compute multiplications. Boredom would quickly set in, leading
to carelessness, leading to mistakes. And even on your best days you wouldn't be
producing answers very fast. Therefore, inventors have been searching for hundreds
of years for a way to mechanize (that is, find a mechanism that can perform) this task.
Its only value is that it aids the memory of the human performing
the calculation. A skilled abacus operator can work on addition
and subtraction problems at the speed of a person equipped
with a hand calculator (multiplication and division are slower).
The abacus is often wrongly attributed to China. In fact, the
oldest surviving abacus was used in 300 B.C. by the Babylonians.
The abacus is still in use today, principally in the far east. A modern
abacus consists of rings that slide over rods, but the older one
pictured below dates from the time when pebbles were used for
counting (the word "calculus" comes from the Latin word for pebble).
John Napier invented logarithms, which are a technology
that allows multiplication to be performed via addition. The
magic ingredient is the logarithm of each operand, which
was originally obtained from a printed table. But Napier
also invented an alternative to tables, where the logarithm
values were carved on ivory sticks which are now called Napier's Bones.
England in 1632 and still in use in the 1960's by the NASA
engineers of the Mercury, Gemini, and Apollo programs which
landed men on the moon.
calculating machines but apparently never built any.
A Leonardo da Vinci drawing showing gears arranged for computing The first gear-driven calculating machine to actually be built was
probably the calculating clock, so named by its inventor, the
German professor Wilhelm Schickard in 1623. This device got
little publicity because Schickard died soon afterward in the
bubonic plague.
an aid for his father who was a tax collector. Pascal built 50
of this gear-driven one-function calculator (it could only add
) but couldn't sell many because of their exorbitant cost and
because they really weren't that accurate (at that time it was
not possible to fabricate gears with the required precision).
Up until the present age when car dashboards went digital,
the odometer portion of a car's speedometer used the very
same mechanism as the Pascaline to increment the next wheel
after each full revolution of the prior wheel. Pascal was a child
prodigy. At the age of 12, he was discovered doing his version o
f Euclid's thirty-second proposition on the kitchen floor. Pascal
went on to invent probability theory, the hydraulic press, and the
syringe. Shown below is an 8 digit version of the Pascaline, and
two views of a 6 digit version:
card system that was developed for looms for later applied to
the U.S. census and then to computers...
The first computers were people! That is, electronic computers (and the
earlier mechanical computers) were given this name because they performed
]the work that had previously been assigned to people. "Computer" was originally
a job title: it was used to describe those human beings (predominantly women)
whose job it was to perform the repetitive calculations required to compute such
things as navigational tables, tide charts, and planetary positions for astronomical
almanacs. Imagine you had a job where hour after hour, day after day, you were
to do nothing but compute multiplications. Boredom would quickly set in, leading
to carelessness, leading to mistakes. And even on your best days you wouldn't be
producing answers very fast. Therefore, inventors have been searching for hundreds
of years for a way to mechanize (that is, find a mechanism that can perform) this task.
This picture shows what were known as "counting tables" [photo courtesy IBM]
A typical computer operation back when computers were people.
The abacus was an early aid for mathematical computations.Its only value is that it aids the memory of the human performing
the calculation. A skilled abacus operator can work on addition
and subtraction problems at the speed of a person equipped
with a hand calculator (multiplication and division are slower).
The abacus is often wrongly attributed to China. In fact, the
oldest surviving abacus was used in 300 B.C. by the Babylonians.
The abacus is still in use today, principally in the far east. A modern
abacus consists of rings that slide over rods, but the older one
pictured below dates from the time when pebbles were used for
counting (the word "calculus" comes from the Latin word for pebble).
A very old abacus
A more modern abacus. Note how the abacus is really just a representation of the human fingers: the
5 lower rings on each rod represent the 5 fingers and the 2 upper rings represent the 2 hands.
In 1617 an eccentric (some say mad) Scotsman namedJohn Napier invented logarithms, which are a technology
that allows multiplication to be performed via addition. The
magic ingredient is the logarithm of each operand, which
was originally obtained from a printed table. But Napier
also invented an alternative to tables, where the logarithm
values were carved on ivory sticks which are now called Napier's Bones.
An original set of Napier's Bones [photo courtesy IBM]
A more modern set of Napier's Bones
Napier's invention led directly to the slide rule, first built inEngland in 1632 and still in use in the 1960's by the NASA
engineers of the Mercury, Gemini, and Apollo programs which
landed men on the moon.
A slide rule
Leonardo da Vinci (1452-1519) made drawings of gear-drivencalculating machines but apparently never built any.
probably the calculating clock, so named by its inventor, the
German professor Wilhelm Schickard in 1623. This device got
little publicity because Schickard died soon afterward in the
bubonic plague.
Schickard's Calculating Clock
In 1642 Blaise Pascal, at age 19, invented the Pascaline asan aid for his father who was a tax collector. Pascal built 50
of this gear-driven one-function calculator (it could only add
) but couldn't sell many because of their exorbitant cost and
because they really weren't that accurate (at that time it was
not possible to fabricate gears with the required precision).
Up until the present age when car dashboards went digital,
the odometer portion of a car's speedometer used the very
same mechanism as the Pascaline to increment the next wheel
after each full revolution of the prior wheel. Pascal was a child
prodigy. At the age of 12, he was discovered doing his version o
f Euclid's thirty-second proposition on the kitchen floor. Pascal
went on to invent probability theory, the hydraulic press, and the
syringe. Shown below is an 8 digit version of the Pascaline, and
two views of a 6 digit version:
Pascal's Pascaline [photo © 2002 IEEE]
A 6 digit model for those who couldn't afford the 8 digit model
A Pascaline opened up so you can observe the gears and cylinders which rotated to display the numerical result
Click on the "Next" hyperlink below to read about the punchedcard system that was developed for looms for later applied to
the U.S. census and then to computers...
Monday, July 25, 2011
Kinds of computers
Types of Computers
PC
===
It should be mentioned that when people refer to a PC in general conversation, they are (almost always) referring to a Microsoft Windows compatible personal computer. These computers are not limited to running the Windows family of operating systems, but their architecture is compatible with the requirements of claiming compatibility. Historically, these would have been explained as "IBM PC" or "IBM Clone" computers.
PC's in general can function as servers or workstations, depending on their implementation. These may be graded, or configured as:
Personal use - Most commonly thought of as a "PC"
Business Class Workstation - the "PC" qualification starts getting a little grey here.
Business Class Server - no longer considered a "PC"
Laptop
Macs
Macs are known for their incredible system stability, quality designs, unique programs and features, and their usually fast speed. Macs are becoming more popular in society, generally used in peoples' homes or in digital graphic design studios. Unfortunately, many people do not invest their money in a Mac because of a Mac's steep price (a $1500 Dell PC is about the same price of a $2400 Apple Macktintosh--both with the same specifications) and the lack of many compatible programs made specifically for Macs (although the number is increasing).
Mainframe : Computers with large Hard Drives, lots of Memory (RAM), multiple CPUs running together, which perform large amounts of computing depending upon the speed of the processors used and amount of RAM included.
Micro Computer : A very small computer, usually used in cameras.
Super Computer : A computer with lots of processors, Memory (RAM), etc. Usually used in scientific research work or they are used by the government. For large manufacturers, a supercomputer typically "breaks down" problems, solves them in small "bits," and then puts the problem "back together." They have a capability of 14,000 micro computers.
PDA
Analog : Older, out-dated computers. They calculate physical Quantities such as voltage, etc...
Digital
Server
What the above answers are stating are names/applications/types of electronic computers. Electronic computers can be subdivided into analog or digital. At a basic level, all digital electronic computers are composed of several parts - including input/output (LCDs, LEDs, keypads, printers, etc.), a processor (often includes an arithmetic logic unit, controller, registers, etc., but doesn't necessarily need to contain all of these), and memory. Analog computers were the predecessors of these digital computers, and are still used in some applications today.
A "computer" is simply something used for performing calculations. A "long" time ago (World War 2), Computer was a title/job description, literally meaning someone who did computations. This definition would also stretch computer to cover mechanical devices, such as the enigma machines used in WW2 for ciphers (by the Germans).
A: Names application random subjects of references but it still boils down to a three components. A German machine did not do computations but rather simplify the process of elimination.
History of Computers
History of Computers
The development of the modern day computer was the result of advances in technologies and man's need to quantify. Papyrus helped early man to record language and numbers. The abacus was one of the first counting machines.. Some of the earlier mechanical counting machines lacked the technology to make the design work. For instance, some had parts made of wood prior to metal manipulation and manufacturing. Imagine the wear on wooden gears. This history of computers site includes the names of early pioneers of math and computing and links to related sites about the History of Computers, for further study. This site would be a good Web adjunct to accompany any book on the History of Computers or Introduction to Computers. The "H" Section includes a link to the History of the Web Beginning at CERN which includes Bibliography and Related Links. Hitmill.com strives to always include related links for a broader educational experience. The material was originally divided into Part 1 & Part 2 |
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