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Keystoning: What is the Term for Projected Images Wider at Top or Bottom?
Keystoning is indeed the precise term for a projected image distortion where the picture appears wider at the top or bottom, or narrower at one end, resembling a trapezoid instead of a true rectangle. This visual anomaly is frequently observed when using video projectors, overhead projectors, or anyRead more
Keystoning is indeed the precise term for a projected image distortion where the picture appears wider at the top or bottom, or narrower at one end, resembling a trapezoid instead of a true rectangle. This visual anomaly is frequently observed when using video projectors, overhead projectors, or any projection display device, affecting the projected picture quality.
This keystone effect occurs because the projector’s lens is not perfectly perpendicular or directly aligned with the projection surface or screen. When the projector is angled up towards the screen, the top part of the image becomes stretched, appearing wider. Conversely, if the projector is angled down, the bottom of the projected display will appear wider. This off-axis projection prevents the light from reaching all parts of the screen at the same angle, leading to this trapezoidal geometric distortion.
To resolve this common projector image issue and ensure a properly rectangular display, most modern projectors include keystone correction features. These can be digital keystone adjustment controls, which digitally manipulate the image, or in higher-end models, optical keystone adjustment mechanisms for superior image correction. Correcting keystoning is crucial for a clear and professional presentation display.
See lessWhat is the Internet? Definition, Key Components, and How it Works Explained
The Internet: A Global Network Explained The Internet is a vast, worldwide network connecting billions of computers and other electronic devices. Think of it as a massive digital spiderweb spanning the globe. It's essentially a network of networks, meaning it's not a single entity but rather a colleRead more
The Internet: A Global Network Explained
The Internet is a vast, worldwide network connecting billions of computers and other electronic devices. Think of it as a massive digital spiderweb spanning the globe. It’s essentially a network of networks, meaning it’s not a single entity but rather a collection of interconnected private, public, academic, business, and government networks.
Key Components of the Internet
Several components are crucial for the Internet to function. These include:
1. Hardware: This encompasses the physical infrastructure, such as routers, servers, cables (fiber optic, copper), satellites, and personal computers, smartphones, and other devices that connect to the network.
2. Protocols: These are sets of rules that govern how data is transmitted and received over the Internet. Key protocols include TCP/IP (Transmission Control Protocol/Internet Protocol), which is the fundamental communication language of the Internet. Other important protocols are HTTP (Hypertext Transfer Protocol) for web browsing, SMTP (Simple Mail Transfer Protocol) for email, and FTP (File Transfer Protocol) for file sharing.
3. Addressing System: Each device on the Internet has a unique IP address, like a postal address, that allows data to be sent to the correct destination. The Domain Name System (DNS) translates human-readable domain names (like google.com) into IP addresses that computers understand.
4. Software: This includes web browsers, email clients, and other applications that allow users to access and interact with the Internet.
How the Internet Works
Data is transmitted across the Internet in small packets. These packets are routed from one router to another until they reach their destination. This process is called packet switching. The TCP/IP protocol ensures that these packets are reliably delivered and reassembled in the correct order. When you request a webpage, your computer sends a request to a web server. The server then sends the webpage back to your computer in the form of data packets. Your web browser then interprets the data and displays the webpage. The internet enables communication and information sharing on a global scale through this complex yet efficient system.
See lessICT Professional Ethics: Identify Unethical Computer Practices [Grade 12]
Unethical computer practices involve actions by ICT professionals that violate moral principles, professional codes of conduct, or legal standards in the digital realm. Common unethical behaviors include data breaches, privacy violations, software piracy, spreading malware, and unauthorized access tRead more
Unethical computer practices involve actions by ICT professionals that violate moral principles, professional codes of conduct, or legal standards in the digital realm. Common unethical behaviors include data breaches, privacy violations, software piracy, spreading malware, and unauthorized access to systems or data.
A question about identifying which option is NOT directly related to ethical issues faced by ICT professionals requires careful consideration of what constitutes unethical behavior in the field. We need to look for an option that is least connected to computer ethics, cybersecurity, responsible technology use, and the potential for illegal or harmful computer activities by ICT specialists.
For example, consider these potential options:
A. Developing and distributing ransomware.
B. Using company resources for personal gain.
C. Ensuring computers meet minimum hardware requirements.
D. Accessing and sharing private customer data without consent.
In this example, option C, “Ensuring computers meet minimum hardware requirements,” is the least related to ethical issues. While important for functionality, it does not directly involve questions of moral or legal responsibility like the other options which relate to cybersecurity risks, data privacy or fraudulent activity. The ethical considerations around ICT relate more to data protection, responsible innovation, and avoiding harm through technology.
See lessMicrosoft Word: What is the top toolbar called? Ribbon & Word Interface
The top toolbar in Microsoft Word, the area with tabs like "File," "Home," "Insert," "Draw," "Design," "Layout," "References," "Mailing," "Review," and "View," is called the Ribbon. The Ribbon is a key part of the Microsoft Word interface. It replaced the traditional menus and toolbars found in oldeRead more
The top toolbar in Microsoft Word, the area with tabs like “File,” “Home,” “Insert,” “Draw,” “Design,” “Layout,” “References,” “Mailing,” “Review,” and “View,” is called the Ribbon. The Ribbon is a key part of the Microsoft Word interface. It replaced the traditional menus and toolbars found in older versions of Word. The Ribbon is designed to help you quickly find the commands and formatting options you need to create and edit documents efficiently. It organizes features into logical groups under different tabs, making it easier to navigate the extensive capabilities of Microsoft Word. So, in Microsoft Word, the area at the top with the “File,” “Edit,” “View,” “Insert,” and other tabs is the Ribbon.
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