Monthly Archives: November 2012

Current Issues on Technology

  • What is antivirus software?
  • Antivirus software is a computer program that detects, prevents, and takes action to disarm or remove malicious software programs, such as viruses and worms. You can help protect your computer against viruses by using antivirus software, such as Microsoft Security Essentials.
  • Computer viruses are software programs that are deliberately designed to interfere with computer operation; record, corrupt, or delete data; or spread themselves to other computers and throughout the Internet.
  • To help prevent the most current viruses, you must update your antivirus software regularly. You can set up most types of antivirus software to update automatically.
  • For on-demand protection, the Microsoft Safety Scanner allows you to visit a website and scan your computer for viruses and other malicious software for free.
  • Antivirus software listed below are fully compatible with Windows 7 – 32 and 64 OS and available freely on the internet for single and non-commercial use.
  • So, have a look on WebSeasoning’s assorted list of Top 8 best and free antivirus software for Windows 7 to keep your computer safe against various virus threats and hackers.
  • 1) Microsoft Security Essentials : Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. For more details and how to download MSE, you can check our article totally dedicated on MSE.

Norton AntiVirus 2013

Symantec has moved Norton 360 to the same release schedule as Norton Internet Security and Norton AntiVirus, making them into a three-tiered strategy for consumer security. Norton AntiVirus is the entry-level product, with Norton Internet Security occupying the middle rung and Norton 360 aimed at people who want the most bang for the most buck.

Notoriously slow to respond to trends, the consumer security field is surprisingly not taking Windows 8 lying down. Norton and many of its competitors are optimizing their suites for Microsoft’s new operating system ahead of its release, and Norton is combining that strategy with efforts to protect you on social networks, protection against scams and other social engineering attacks, and a bolstered firewall.

Workplace Tools

Adobe Photoshop is a graphics editing program developed and published by Adobe Systems.Adobe’s 2003 “Creative Suite” rebranding led to Adobe Photoshop 8’s renaming to Adobe Photoshop CS. Thus, Adobe Photoshop CS6 is the 13th major release of Adobe Photoshop. The CS rebranding also resulted in Adobe offering numerous software packages containing multiple Adobe programs for a reduced price. Adobe Photoshop is released in two editions: Adobe Photoshop, and Adobe Photoshop Extended, with the Extended having extra 3D image creation, motion graphics editing, and advanced image analysis features. Adobe Photoshop Extended is included in all of Adobe’s Creative Suite offerings except Design Standard, which includes the Adobe Photoshop edition.

Alongside Photoshop and Photoshop Extended, Adobe also publishes Photoshop Elements and Photoshop Light room, collectively called “The Adobe Photoshop Family”. In 2008, Adobe released Adobe Photoshop Express, a free web-based image editing tool to edit photos directly on blogs and social networking sites; in 2011 a version was released for the Android operating system and the iOS operating system

Adobe Photoshop CS6 is the stable version of the industry standard image editor with some interesting new features.

Probably the most notable new feature is the Content Aware tool which makes editing Photoshop more “intelligent” plus there’s a new design and a streamlined interface. In addition, basic video editing functions have been added for the first time.

When you first open Adobe Photoshop CS6, the most eye-catching thing is the revamped colorful user interface. However, if you don’t like the new look, you can revert to the old grey interface via Preferences – Interface. Beyond this however, there are some useful new features.

Communication and network

What is communication?

Computer communications describes a process in which two or more computers or devices transfer data, instructions and information. The process shall go thru 3 basic levels which is the sending device, communications channel and lastly the receiving device.

 

Example of Communication?

–          Blogs

–          Chat rooms

–          Email

–          Fax

–          Instant messaging

–          Internet

–          Newsgroup

–          Web

–          Wikis

 

What is Network?

Network is a collection of computers and devices connected together via communications devices and transmission media.

Advantages of network?

A network would come in very handy as it will help to facilitate communications, sharing hardware, sharing data and information, sharing software and to transfer funds.

 

Types of Network?

There is basically three types of network which is LAN, MAN and WAN. Local area network (LAN) is a network that connects computers and devices in a limited area. Metropolitan Area Network (MAN) is a network which connect LAN in a metropolitan area. Wide area network (WAN) is a network that covers a large scale of place which will connect all the MAN.

What is network architecture?

Network architecture refers to the layout of the network, consisting of the hardware, software, connectivity, communication protocols and mode of transmission, such as wired or wireless. Know about the types of network classified according to the areas covered such as LAN, MAN and WAN. Learn about the network topologies categorized according to the layout of equipments and computers such as star, loop, bus, or mesh topologies. There are many communication protocols used in the networking technology. It is important to know about the network architecture as networks play a very important role in today’s world.

 

What is network communication standards/protocol?

To avoid chaos in computer communications, rules must be established for the exchange of data from one site to another. These rules are known as line protocol. Communications software packages control the speed and mode of communications between computer systems. Many different standard network protocols exist to perform addressing, routing, and packetizing. All provide formal definitions for how addressing and routing is to be executed, and specify packet structures to transfer this information between computers. OSI, TCP/IP, IPX/SPX, and X.25 are commonly used routing protocols.

 

Telecommunication network?

telecommunications network is a collection of terminals, links and nodes which connect to enable telecommunication between users of the terminals. Each terminal in the network have a unique address so messages or connections can be routed to the correct recipients. The collection of addresses in the network is called the address space.The links connect the nodes together and are themselves built upon an underlying transmission network which physically pushes the message across the link, using circuit switched, message switched or packet switched routing.

 

Types of telephone communication?

–          Dial-up connection

–          Dedicated line

–          ISDN line

–          DSL

–          FTTP

What is communication devices?

A communications devices is any type of hardware capable of transmitting data, instructions, and information between a sending device and receiving device.

 

Communication channel?

The amount of data that can travel over a communications channel sometimes is called the bandwidth. Latency is the time it takes a signal to travel from one location to another on a network. Transmission media carries one or more signals, while  Broadband media can transmit multiple signals simultaneously at a time.

 

Transmission media?

There is basically two types of transmission media which is the physical and wireless. Example of physical transmission media is fibre optic cable. Example for wireless TM is cellular radio, microwaves and etc.

 

Latest technology?

Latest technology for wired network is fibre optic. Fibre optic is the new technology which used optical fibre as the inner filling of a cable. With this it’ll allow data and information to be transfer by the speed of light when basically they moved the data using light refraction technology.

      

Programming Language and Software Development

PROGRAMMING LANGUAGES

A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely.

Java

Java was originally called OAK, and was designed for handheld devices and set-top boxes. Oak was unsuccessful so in 1995 Sun changed the name to Java and modified the language to take advantage of the burgeoning World Wide Web.

Java is an object-oriented language similar to C++, but simplified to eliminate language features that cause common programming errors. Java source code files (files with a .java extension) are compiled into a format called bytecode (files with a .class extension), which can then be executed by a Java interpreter. Compiled Java code can run on most computers because Java interpreters and runtime environments, known as Java Virtual Machines (VMs), exist for most operating systems, including UNIX, the Macintosh OS, and Windows.

Java is a general purpose programming language with a number of features that make the language well suited for use on the World Wide Web. Small Java applications are called Java applets and can be downloaded from a Web server and run on your computer by a Java-compatible Web browser, such as Netscape Navigator or Microsoft Internet Explorer.

SOFTWARE DEVELOPMENT

Samsung New PC Studio

Samsung New PC Studio is a tool that connects everything stored on your phone with your computer, letting you synchronize, backup and transfer files from one device to another with ease.

Your phone saves some really important information: calendar, photos, messages, videos, maps, news, documents. Samsung New PC Studio is the official tool for Samsung phones that lets you manage and store a copy of all your information and files on your PC.

Using Samsung New PC Studio is very simple. Connect your phone to your computer and view the contents of the phone directly on the PC. You can move photos, music and videos easily from the phone to the computer or vice versa. Just drag and drop them in the final destination.

       

Hardware are Tools

Input Device

An input device is any device that provides input to a computer. There are dozens of possible input devices, but the two most common ones are a keyboard and mouse. Every key you press on the keyboard and every movement or click you make with the mouse sends a specific input signal to the computer. These commands allow you to open programs, type messages, drag objects, and perform many other functions on your computer.

Since the job of a computer is primarily to process input, computers are pretty useless without input devices. Just imagine how much fun you would have using your computer without a keyboard or mouse. Not very much. Therefore, input devices are a vital part of every computer system.

While most computers come with a keyboard and mouse, other input devices may also be used to send information to the computer. Some examples include joysticks, MIDI keyboards, microphones, scanners, digital cameras, webcams, card readers, UPC scanners, and scientific measuring equipment. All these devices send information to the computer and therefore are categorized as input devices. Peripherals that output data from the computer are called output devices.

On most computers, a keyboard is the primary text input device. (The mouse is also a primary input device but lacks the ability to easily transmit textual information.) The keyboard also contains certain standard function keys, such as the Escape key, tab and cursor movement keys, shift and control keys, and sometimes other manufacturer-customized keys.

The computer keyboard uses the same key arrangement as the mechanical and electronic typewriter keyboards that preceded the computer. The standard arrangement of alphabetic keys is known as the Qwerty (keyboard, its name deriving from the arrangement of the five keys at the upper left of the three rows of alphabetic keys. This arrangement, invented for one of the earliest mechanical typewriters, dates back to the 1870s. Another well-known key arrangement is the Dvorak system, which was designed to be easier to learn and use. The Dvorak keyboard was designed with the most common consonants on one side of the middle or home row and the vowels on the other side so that typing tends to alternate key strokes back and forth between hands. Although the Dvorak keyboard has never been widely used, it has adherents.

Because many keyboard users develop a cumulative trauma disorder, such as carpal tunnel syndrome, a number of ergonomic keyboards have been developed. Approaches include keyboards contoured to alleviate stress and foot-driven pedals for certain keys or keyboard functions.

What Are Output Devices?

Output devices are pieces of computer hardware that allow a computer system to communicate information to a user or another system. This information can be in any form, and includes sound, images, and even tactile experiences. Output devices can usually only be used to send data from the computer; items called input devices allow users and other systems to send data to the computer.

Some of the most common output devices allow computers to present information visually. The visual display unit called a monitor that can be found connected to almost every personal computer is the best example of this. Text, pictures, and other images are displayed on the monitor, allowing users to interact with computer programs and receive data. Video projectors are another type of output device. They function in a way similar to monitors, but display images over a much larger area. Computer printers are another type of output device that can be easily found. Printers allow the computer to produce documents, pictures, and images on paper through the use of inks and other dyes.

Audio output devices are also common. Computer speakers are the primary source of this form of output. They allow the computer to emit sounds that include music, audio tracks to digitized television shows, and even the voices of other users. Headphones also do the same thing, but are placed closer to the ears so that the sounds cannot be heard by others.

Computers can even communicate with users through the sense of touch. Refreshable Braille displays, or Braille terminals, allow computers to send information by way of raised dots that are “read” with the fingertips. Force feedback devices, or haptic devices, are sometimes built into joysticks and mice so that users can feel vibrations and pressure. Tactile output devices are less common than many other types, but can still be extremely important to users.

Rarely, output devices can also be input devices. A storage device such as a CD-RW drive is an excellent example of this. The computer uses it as an output device when it is writing information to a CD-ROM or other media that can be read by other computers. However, the computer uses it as an input device when reading information from a CD-ROM or other piece of storage media that has data written on it from another system.

Storage

In a computer, storage is the place where data is held in an electromagnetic or optical form for access by a computer processor. There are two general usages.

  1. Storage is frequently used to mean the devices and data connected to the computer through input/output operations that is hard disk and tape system and other forms of storage that don’t include computer memory and other in-computer storage. For the enterprise, the options for this kind of storage are much greater variety and expense than related to memory.
  2. In a more formal usage, storage has been divided into: (1)primary storage, which holds data in memory (sometimes call random access memory or RAM) and (2)secondary storage, which holds data on hard disks, tapes, and other devices requiring input/output operations.
  3. Types of Storage Devices:

(1) Floppy drive

(2) Super drive

(3) Zip Drive

(4) CD Burner

(5) DVD burner

(6) Hard Drive

(7) Flash drive

(8) Tape drive

(9) NAS – Netowork attachment storage

(10) SAN – Storage area network

Introduction to computer & World Wide Web

 

What are computers?

Computers are machines that perform tasks or calculations according to a set of instructions, or programs. The first fully electronic computers, introduced in the 1940s, were huge machines that required teams of people to operate. Compared to those early machines, today’s computers are amazing. Not only are they thousands of times faster, they can fit on your desk, in your lap, or even in your pocket.

Computers work through an interaction of hardware and software. Hardware refers to the parts of a computer that you can see and touch, including the case and everything inside it. The most important piece of hardware is a tiny rectangular chip inside your computer called the central processing unit (CPU), or microprocessor. It’s the “brain” of your computer—the part that translates instructions and performs calculations. Hardware items such as your monitor, keyboard, mouse, printer, and other items are often called hardware devices, or devices.

Software refers to the instructions, or programs, that tell the hardware what to do. A word processing program that you can use to write letters on your computer is a type of software. The operating system (OS) is software that manages your computer and the devices connected to it. Two well-known operating systems are Windows and Macintosh operating system. Your computer uses the Windows operating system.

Laptop computers

Laptop computers are lightweight mobile PCs with a thin screen. They are often called notebook computers because of their small size. Laptops can operate on batteries, so you can take them anywhere. Unlike desktops, laptops combine the CPU, screen, and keyboard in a single case. The screen folds down onto the keyboard when not in use.

 

What is The Internet?

The Internet is a massive network of networks, a networking infrastructure. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. Information that travels over the Internet does so via a variety of languages known as protocols.

What is The Web (World Wide Web)?

The World Wide Web, or simply Web, is a way of accessing information over the medium of the Internet. It is an information-sharing model that is built on top of the Internet. The Web uses the HTTP protocol, only one of the languages spoken over the Internet, to transmit data. Web services, which use HTTP to allow applications to communicate in order to exchange business logic, use the the Web to share information. The Web also utilizes browsers, such as Internet Explorer or Firefox, to access Web documents called Web pages that are linked to each other via hyperlinks. Web documents also contain graphics, sounds, text and video.