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Friday, March 18, 2011

Malacca




St. Pauls Church at the top of the hill, surrounded by the fort. At the left: Malacca river.
Francis Valentijn (1726)

Malacca is about 150 kilometer south of Kuala Lumpur. Across the North-South expressway you'll be within two hours in Malacca. In the middle of the center are several hotel, who will offer you a "promotion rate". IA room with breakfast and taxes will offered to you for about RM 100. So why wouldn't we stay just one night in this beautiful, historic city? Just one night, that's enough, there's so much to see in the rest of Malaysia! 
Malacca had a lot of conquerors in the past century's: Chinese, Portuguese, Dutch en English. In the past the city was strategic place at the border of the Strait of Malacca. It was a major port along the spice-route, and its harbor bristled with the sails and masts of Chinese junks and spice-loaded vessels from all over world. Also was traded: silk and porcelain from China; textiles from Gujarat and Coromandel in India; camphor from Borneo; sandalwood from Timor; nutmeg, mace, and cloves from the Moluccas, gold and pepper from Sumatra; and tin from western Malaysia.
The strong wind was always blowing from the right position for the sailors and Malacca was a safe place to be, when the sailors came ashore.  No wonder that they took this city for provision. Malacca became important for all who wanted to rule the Strait of Malacca. And...that Strait was so important for the spice-route. That's why Malacca had since 1400 so much occupiers and could grow to a world wide trade center. 


In 1511 Malacca was conquered by the Portuguese. The Portuguese came to the East to capture the spice trade. Led by Alfonso de Albuquerque.  The Portuguese failed to maintain the glory and prosperity of Malacca because of restrictive policies, competition and wars. The Portuguese ruled Malacca from 1511 to 1641.
On the incline of the hill  (St. Paul's Hill) they built a  fort: "A Famosa". Later this was extended, so that the hill was surrounded by the the wall of the fort. Inside these walls were two palaces, a castle, a meeting room for the Portuguese Council and there were five churches. Unfortunately, the only thing that's left, is the "Porta de Santiago", a gate without a wall that leaded to the fort.
After a siege of 7 months the Dutch of the VOC (the Dutch East India Company) conquered the fort in 1641. At that time Malacca wasn't so rich and prosperous anymore. After the conquest by the VOC the Dutch could start rebuilding the fort. Walls were repaired, bastions got another name and they digged canal around the fort with a drawing bridge. At the summit of its power Malacca had a garrison of 550 Dutchmen and 50.000 inhabitants.
Despite all the new buildings the Dutch built, Malacca trade quickly declined after their conquest. The Dutch had only two goals: safety of the spice-route and elimination of the competitors.
In August of the year 1795 the English (East India Company) occupied Malacca. Holland had in his region in Europe troubles with the French (Napoleon), who were expending their borders. Holland didn't care for such an unimportant outpost, which Malacca was in this period. It's a great pity for the history of Malacca, that the English decided then to blow up the walls and gates. 


Augustine Earle (1828) 

The highlights of Malacca are in short distance of each other. Just a little walk. They're concentrated around St Paul's hill (see the old drawing at the top). That's where the fort was situated. It's nearby the Malacca-river, which was so important in the old days. 

Wednesday, March 16, 2011

Types of computer


Computer 

Definition


A computer is a machine that can be programmed to manipulate symbols. Its principal characteristics are:
  • It responds to a specific set of instructions in a well-defined manner.
  • It can execute a prerecorded list of instructions (a program).
  • It can quickly store and retrieve large amounts of data.
Therefore computers can perform complex and repetitive procedures quickly, precisely and reliably. Modern computers are electronic and digital. The actual machinery (wires, transistors, and circuits) is called hardware; the instructions and data are called software. All general-purpose computers require the following hardware components:
  • Central processing unit (CPU): The heart of the computer, this is the component that actually executes instructions organized in programs ("software") which tell the computer what to do.
  • Memory (fast, expensive, short-term memory): Enables a computer to store, at least temporarily, data, programs, and intermediate results.
  • Mass storage device (slower, cheaper, long-term memory): Allows a computer to permanently retain large amounts of data and programs between jobs. Common mass storage devices include disk drives and tape drives.
  • Input device: Usually a keyboard and mouse, the input device is the conduit through which data and instructions enter a computer.
  • Output device: A display screen, printer, or other device that lets you see what the computer has accomplished.
In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another.

Computer sizes and power


Computers can be generally classified by size and power as follows, though there is considerable overlap:
  • Personal computer: A small, single-user computer based on a microprocessor.
  • Workstation: A powerful, single-user computer. A workstation is like a personal computer, but it has a more powerful microprocessor and, in general, a higher-quality monitor.
  • Minicomputer: A multi-user computer capable of supporting up to hundreds of users simultaneously.
  • Mainframe: A powerful multi-user computer capable of supporting many hundreds or thousands of users simultaneously.
  • Supercomputer: An extremely fast computer that can perform hundreds of millions of instructions per second.

Supercomputer and Mainframe

Supercomputer is a broad term for one of the fastest computers currently available. Supercomputers are very expensive and are employed for specialized applications that require immense amounts of mathematical calculations (number crunching). For example, weather forecasting requires a supercomputer. Other uses of supercomputers scientific simulations, (animated) graphics, fluid dynamic calculations, nuclear energy research, electronic design, and analysis of geological data (e.g. in petrochemical prospecting). Perhaps the best known supercomputer manufacturer is Cray Research.
Mainframe was a term originally referring to the cabinet containing the central processor unit or "main frame" of a room-filling Stone Age batch machine. After the emergence of smaller "minicomputer" designs in the early 1970s, the traditional big iron machines were described as "mainframe computers" and eventually just as mainframes. Nowadays a Mainframe is a very large and expensive computer capable of supporting hundreds, or even thousands, of users simultaneously. The chief difference between a supercomputer and a mainframe is that a supercomputer channels all its power into executing a few programs as fast as possible, whereas a mainframe uses its power to execute many programs concurrently. In some ways, mainframes are more powerful than supercomputers because they support more simultaneous programs. But supercomputers can execute a single program faster than a mainframe. The distinction between small mainframes and minicomputers is vague, depending really on how the manufacturer wants to market its machines.




Minicomputer

It is a midsize computer. In the past decade, the distinction between large minicomputers and small mainframes has blurred, however, as has the distinction between small minicomputers and workstations. But in general, a minicomputer is a multiprocessing system capable of supporting from up to 200 users simultaneously.



Workstation

It is a type of computer used for engineering applications (CAD/CAM), desktop publishing, software development, and other types of applications that require a moderate amount of computing power and relatively high quality graphics capabilities. Workstations generally come with a large, high-resolution graphics screen, at large amount of RAM, built-in network support, and a graphical user interface. Most workstations also have a mass storage device such as a disk drive, but a special type of workstation, called a diskless workstation, comes without a disk drive. The most common operating systems for workstations are UNIX and Windows NT. Like personal computers, most workstations are single-user computers. However, workstations are typically linked together to form a local-area network, although they can also be used as stand-alone systems.
N.B.: In networking, workstation refers to any computer connected to a local-area network. It could be a workstation or a personal computer.




Personal computer

It can be defined as a small, relatively inexpensive computer designed for an individual user. In price, personal computers range anywhere from a few hundred pounds to over five thousand pounds. All are based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip. Businesses use personal computers for word processing, accounting, desktop publishing, and for running spreadsheet and database management applications. At home, the most popular use for personal computers is for playing games and recently for surfing the Internet.
Personal computers first appeared in the late 1970s. One of the first and most popular personal computers was the Apple II, introduced in 1977 by Apple Computer. During the late 1970s and early 1980s, new models and competing operating systems seemed to appear daily. Then, in 1981, IBM entered the fray with its first personal computer, known as the IBM PC. The IBM PC quickly became the personal computer of choice, and most other personal computer manufacturers fell by the wayside. P.C. is short for personal computer or IBM PC. One of the few companies to survive IBM's onslaught was Apple Computer, which remains a major player in the personal computer marketplace. Other companies adjusted to IBM's dominance by building IBM clones, computers that were internally almost the same as the IBM PC, but that cost less. Because IBM clones used the same microprocessors as IBM PCs, they were capable of running the same software. Over the years, IBM has lost much of its influence in directing the evolution of PCs. Therefore after the release of the first PC by IBM the term PC increasingly came to mean IBM or IBM-compatible personal computers, to the exclusion of other types of personal computers, such as Macintoshes. In recent years, the term PC has become more and more difficult to pin down. In general, though, it applies to any personal computer based on an Intel microprocessor, or on an Intel-compatible microprocessor. For nearly every other component, including the operating system, there are several options, all of which fall under the rubric of PC
Today, the world of personal computers is basically divided between Apple Macintoshes and PCs. The principal characteristics of personal computers are that they are single-user systems and are based on microprocessors. However, although personal computers are designed as single-user systems, it is common to link them together to form a network. In terms of power, there is great variety. At the high end, the distinction between personal computers and workstations has faded. High-end models of the Macintosh and PC offer the same computing power and graphics capability as low-end workstations by Sun Microsystems, Hewlett-Packard, and DEC
.
Personal Computer Types

Actual personal computers can be generally classified by size and chassis / case. The chassis or case is the metal frame that serves as the structural support for electronic components. Every computer system requires at least one chassis to house the circuit boards and wiring. The chassis also contains slots for expansion boards. If you want to insert more boards than there are slots, you will need an expansion chassis, which provides additional slots. There are two basic flavors of chassis designs–desktop models and tower models–but there are many variations on these two basic types. Then come the portable computers that are computers small enough to carry. Portable computers include notebook and subnotebook computers, hand-held computers, palmtops, and PDAs.



Tower model

The term refers to a computer in which the power supply, motherboard, and mass storage devices are stacked on top of each other in a cabinet. This is in contrast to desktop models, in which these components are housed in a more compact box. The main advantage of tower models is that there are fewer space constraints, which makes installation of additional storage devices easier.



Desktop model

A computer designed to fit comfortably on top of a desk, typically with the monitor sitting on top of the computer. Desktop model computers are broad and low, whereas tower model computers are narrow and tall. Because of their shape, desktop model computers are generally limited to three internal mass storage devices. Desktop models designed to be very small are sometimes referred to as slimline models.




Notebook computer

An extremely lightweight personal computer. Notebook computers typically weigh less than 6 pounds and are small enough to fit easily in a briefcase. Aside from size, the principal difference between a notebook computer and a personal computer is the display screen. Notebook computers use a variety of techniques, known as flat-panel technologies, to produce a lightweight and non-bulky display screen. The quality of notebook display screens varies considerably. In terms of computing power, modern notebook computers are nearly equivalent to personal computers. They have the same CPUs, memory capacity, and disk drives. However, all this power in a small package is expensive. Notebook computers cost about twice as much as equivalent regular-sized computers. Notebook computers come with battery packs that enable you to run them without plugging them in. However, the batteries need to be recharged every few hours.




Laptop computer

A small, portable computer - small enough that it can sit on your lap. Nowadays, laptop computers are more frequently called notebook computers.




Subnotebook computer

A portable computer that is slightly lighter and smaller than a full-sized notebook computer. Typically, subnotebook computers have a smaller keyboard and screen, but are otherwise equivalent to notebook computers.



Hand-held computer

A portable computer that is small enough to be held in one’s hand. Although extremely convenient to carry, handheld computers have not replaced notebook computers because of their small keyboards and screens. The most popular hand-held computers are those that are specifically designed to provide PIM (personal information manager) functions, such as a calendar and address book. Some manufacturers are trying to solve the small keyboard problem by replacing the keyboard with an electronic pen. However, these pen-based devices rely on handwriting recognition technologies, which are still in their infancy. Hand-held computers are also called PDAs, palmtops and pocket computers.



Palmtop

A small computer that literally fits in your palm. Compared to full-size computers, palmtops are severely limited, but they are practical for certain functions such as phone books and calendars. Palmtops that use a pen rather than a keyboard for input are often called hand-held computers or PDAs. Because of their small size, most palmtop computers do not include disk drives. However, many contain PCMCIA slots in which you can insert disk drives, modems, memory, and other devices. Palmtops are also called PDAs, hand-held computers and pocket computers.



PDA

Short for personal digital assistant, a handheld device that combines computing, telephone/fax, and networking features. A typical PDA can function as a cellular phone, fax sender, and personal organizer. Unlike portable computers, most PDAs are pen-based, using a stylus rather than a keyboard for input. This means that they also incorporate handwriting recognition features. Some PDAs can also react to voice input by using voice recognition technologies. The field of PDA was pioneered by Apple Computer, which introduced the Newton MessagePad in 1993. Shortly thereafter, several other manufacturers offered similar products. To date, PDAs have had only modest success in the marketplace, due to their high price tags and limited applications. However, many experts believe that PDAs will eventually become common gadgets.
PDAs are also called palmtops, hand-held computers and pocket computers.



Advantages and Disadvantages of the Internet

During his evolution journey from Neanderthals to Homo erectus and then to Homo sapiens, man has come long way. Because of his continuous quest for more and more amenities and facilities, the nineties have seen a major turn around with the invention of computers. 10 years ago, the term internet was practically anonymous to most of the people. And today internet has become the most ever powerful tool for man throughout the world. The internet is a collection of various services and resources.

Although, many people still think e-mail and World Wide Web as the principle constituents of internet, there is lot more in store than e-mail, chat rooms, celebrity web sites and search engines. It also became the best business tool of modern scenario. Today internet has brought a globe in a single room. Right from news across the corner of the world, wealth of knowledge to shopping, purchasing the tickets of your favorite movie-everything is at your finger tips. Internet has great potential and lot to offer… however, like every single innovation in science and technology, internet has its own advantages and disadvantages.

Advantages

Communication
The foremost target of internet has always been the communication. And internet has excelled beyond the expectations .Still; innovations are going on to make it faster, more reliable. By the advent of computer’s Internet, our earth has reduced and has attained the form of a global village.

Now we can communicate in a fraction of second with a person who is sitting in the other part of the world. Today for better communication, we can avail the facilities of e-mail; we can chat for hours with our loved ones. There are plenty messenger services in offering. With help of such services, it has become very easy to establish a kind of global friendship where you can share your thoughts, can explore other cultures of different ethnicity.



Information
Information is probably the biggest advantage internet is offering. The Internet is a virtual treasure trove of information. Any kind of information on any topic under the sun is available on the Internet. The search engines like Google, yahoo is at your service on the Internet. You can almost find any type of data on almost any kind of subject that you are looking for. There is a huge amount of information available on the internet for just about every subject known to man, ranging from government law and services, trade fairs and conferences, market information, new ideas and technical support, the list is end less.

Students and children are among the top users who surf the Internet for research. Today, it is almost required that students should use the Internet for research for the purpose of gathering resources. Teachers have started giving assignments that require research on the Internet. Almost every coming day, researches on medical issues become much easier to locate. Numerous web sites available on the net are offering loads of information for people to research diseases and talk to doctors online at sites such as, America’s Doctor. During 1998 over 20 million people reported going online to retrieve health information.




Entertainment
Entertainment is another popular raison d'être why many people prefer to surf the Internet. In fact, media of internet has become quite successful in trapping multifaceted entertainment factor. Downloading games, visiting chat rooms or just surfing the Web are some of the uses people have discovered. There are numerous games that may be downloaded from the Internet for free. The industry of online gaming has tasted dramatic and phenomenal attention by game lovers. Chat rooms are popular because users can meet new and interesting people. In fact, the Internet has been successfully used by people to find life long partners. When people surf the Web, there are numerous things that can be found. Music, hobbies, news and more can be found and shared on the Internet.


Services
Many services are now provided on the internet such as online banking, job seeking, purchasing tickets for your favorite movies, guidance services on array of topics engulfing the every aspect of life, and hotel reservations. Often these services are not available off-line and can cost you more.





Disadvantages


Theft of Personal information
If you use the Internet, you may be facing grave danger as your personal information such as name, address, credit card number etc. can be accessed by other culprits to make your problems worse.




Spamming 
Spamming refers to sending unwanted e-mails in bulk, which provide no purpose and needlessly obstruct the entire system. Such illegal activities can be very frustrating for you, and so instead of just ignoring it, you should make an effort to try and stop these activities so that using the Internet can become that much safer. 





Virus threat
Virus is nothing but a program which disrupts the normal functioning of your computer systems. Computers attached to internet are more prone to virus attacks and they can end up into crashing your whole hard disk, causing you considerable headache.


Pornography 
This is perhaps the biggest threat related to your children’s healthy mental life. A very serious issue concerning the Internet. There are thousands of pornographic sites on the Internet that can be easily found and can be a detrimental factor to letting children use the Internet.



Sunday, February 13, 2011

Getting your degree locally...





Distance from home is often an important factor when choosing where to study. You could probably group people into 4 different categories when it comes to choosing where to study and the distance it is from home :
  • Those that are keen to study at a university or college far away from home - sometimes even in a different country.
  • Those that want to study a certain distance away from home, but not so far that they can't reasonably get back for the odd weekend.
  • Those that want to study for a degree at a local college or university or at least one that's commutable from home.
Those that aren't bothered whether they study at local college or university or one that's far away.
In the UK there has been a bit of a tradition that when considering where to study for a degree, students look at universities and colleges fairly, or very, far away from home.
This tradition has recently started to change somewhat and more and more students are choosing to study at a local college or university and get their degree close to home.


There are a few reasons why when choosing where to study people are increasingly opting for a local college or university:
  • Financial

Probably the biggest factor of all. Going away to university is an expensive thing. Expenses like rent , bills, food, transport (whilst at uni and also travelling back and forth between university and home) can be removed or significantly reduced by staying at home.




  • Family, friends, community
    Studying locally enables people to remain close to their friends and family whilst at the same time taking advantage of everything that being a student has to offer - a wider social group, clubs and societies, a Student Union, nights out and so on. You can also keep any part time jobs you might have.


  • Change in cultural attitudes
    In many countries across the world such as Spain and Australia, most people get their degree locally and stay living at home. In the UK there has been a culture of 'going away' to study for a degree, but increasingly the Spanish and Australian way of doing things is being seen as a good option. The point is, is that the question of where and how to get your degree isn't set in stone. Just because there's been a culture in the past of going away to university, doesn't mean studying locally isn't just as valid and in many cases can be an even more attractive option.


Advantages of reading....

1. Reading is an active mental process – Unlike TV, books make you to use your brain. By reading, you think more and become smarter.

2. It is a fundamental skill builder - Every good course on the planet has a matching book to go with it. Why? Because books help clarify difficult subjects. Books provide information that goes deeper than just classroom discussion.

3. Improves your vocabulary – Remember in elementary school when you learned how to infer the meaning of one word by reading the context of the other words in the sentence? You get the same benefit from book reading. While reading books, especially challenging ones, you will find yourself exposed to many new words you wouldn’t be otherwise.

4. Gives you a glimpse into other cultures and places – What is your favorite vacation spot? I would bet you read a lot about that destination. The more information the better. Books can expand your horizons by letting you see what other cities and countries have to offer before you visit them.

5. Improves concentration and focus – Like I pointed out before, reading books takes brain power. It requires you to focus on what you are reading for long periods. Unlike magazines, Internet posts or e-Mails that might contain small chunks of information. Books tell the whole story. Since you must concentrate in order to read, like a muscle, you will get better at concentration.

6. Improves memory – Many studies show if you don’t use your memory, you lose it. Crossword puzzles are an example of a word game that staves off Alzheimer’s. Reading, although not a game, helps you stretch your memory muscles in a similar way. Reading requires remembering details, facts and figures and in literature, plot lines, themes and characters.

7. Learn anywhere – Books are portable. You can take them almost anywhere. As such, you can learn almost anywhere too.


8. Improves creativity – by reading more books and exposing yourself to new and more complete information, you will also be able to come up with more creative ideas. As a personal example, I read many, many books on IT Networking. So often, when IT Admins are stumped with a problem, I can come up with a creative (smack your head simple) solution that isn’t written anywhere. But the reason I can do that is because I have read so many books on the subject, I can combine lessons from all of them into new solutions.


9. Gives you something to talk about – Have you ever run out of stuff to talk about with your best friend, wife or husband? This can be uncomfortable. It might even make married couples wonder if their marriage is in trouble. However, if you read a lot of books, you’ll always have something to talk about. You can discuss various plots in the novels you read, you can discuss the stuff you are learning in the business books you are reading as well. The possibilities of sharing are endless.

10. Improves your reasoning skills – Books for professionals contain arguments for or against the actions within. A book on cooking argues that Chili powder goes well with beef and goes poorly with ice-cream. A book on building a business argues that testing an idea for profitability before setting up is a smart strategy and argues against just barreling forward with the idea without testing.

11. Decreases mistakes – Although I would never suggest putting off an important goal because you fear making mistakes, it is still important to sharpen the saw. When you gather the deep and widewisdom that books can provide, you are less apt to make mistakes.

12. Decreased boredom – One of the rules I have is if I am feeling bored, I will pick up a book and start reading. What I’ve found by sticking to this is that I become interested in the book’s subject and stop being bored. I mean, if you’re bored anyway, you might as well be reading a good book, right?

13. Reduces stress - Many avid readers (including me) unwind by reading. Compared with the person who gets home from work and immediately turns on the TV news, you are going from work stress to crime stress. But it’s not just news. TV as a source of relaxation is too full of loud commercials and fast moving (often violent) images. If relaxation is something you want, turn off the TV or computer and pick up a book.

14. The book is always better than the movie – except for perhaps No Country for Old Men:)


What are some of the most important books you have read? What is the title that changed your life? If you’ve found a book that made a major change in how you work, live or love, please tell us about it in the comments below.

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