The Tech Storror

  Analog and Digital Transmission Analog Signal: The system in which variable signal i.e. the signal can have any meaning at any time, is called analog signal. This signal is used for data processing in analog devices like radio, TV etc. The wave/shape of an analog signal is-- Digital Signal: The level of the signal is variable, i.e. the level of the signal changes over time in a certain step, it is called a digital signal. This signal is used for data processing in digital devices like computers, digital clocks etc. The wave/shape of a digital signal is-- Carrier Signal: Carrier signal is a type of high frequency signal, which is used as a carrier wave to transmit electrical signals to distant places. - The wave/shape of carrier signal is the difference between analog, digital and carrier signal: The difference between analog, digital and carrier signal is given below-- Analog signal (i) A system in which the signal is variable i.e. the signal can have any value at any time, is ca...

Computer maintenance methods from controlling physical damage to computers Maintenance from dust and smoke: Computers can be damaged by dust as follows-- (i) Due to non-conductive coating of dust on various circuits, the heat generated in the circuit cannot be dissipated, resulting in damage to the circuit. (ii) Due to the formation of dust coating, the rotating components of the computer cannot rotate properly, resulting in various operational problems. (iii) Dust accumulation can damage the heads of disk drives. (iv) Cigarette ash dust can damage the data stored on the disk. The following steps can be taken to protect computer systems from dust:- (i) Computers should be properly cleaned at various time intervals. (ii) No smoking in the computer room. (iii) No powdered food should be consumed while sitting near the computer. (iv) Computers should not be placed where chalk is written on the blackboard. (v) The computer should be covered with a plastic cover. Maintenance due to temperat...

Fundamentals of Digital Electronics Characteristics of Analog Signals and Digital Signals: Analog Signal: Continuous electrical signal is called an analogue signal. The change in analogue signal value over time is infinite. A simple signal-generating device converts physical quantities such as pressure, dip, light intensity, noise, etc. into equivalent analogue electrical signals through transducers. The value of this signal is always changing. That is, an electrical signal whose value continuously increases or decreases with time is called an analogue signal. The figure below shows the shape of an analogue signal: Digital Signal: The voltage level of the digital signal is isolated. The voltage level of a digital signal is expressed by two or more states. All these levels are expressed as low (Low) and high (High) or digital 0 volts. A discrete electrical signal is called a digital signal. The change in value of a digital signal with time is finite and the change in value is expressed ...

Analog Electronics (i) The branch of electronics technology that analyzes and discusses the design, construction, operational use, advantages, disadvantages, etc. of analogue signals and various circuits and devices operated by analogue signals is called analogue electronics. The branch of electronics technology that deals with digital signals, numbers and the design, construction, operation, use, advantages and disadvantages of various circuits and devices operated by digital signals. Various topics are analyzed and discussed, called digital electronics. (ii) Analog electronics systems use ever-changing electrical signals. Digital electronics systems have two defined levels of signals. (iii) Analog electronics are difficult to diagnose due to variations in signal. Since there are only two layers in the digital electronics system, fault diagnosis is easy. (vi) Signal processing circuit components are quite expensive in analogue electronics systems. Circuits used for signals in digital ...

 | Digital Divide The development of information and communication technology has divided people around the world into two groups in terms of the convenience of its use. One group is benefiting from the use of modern information and communication technology and the other group is not. The digital divide exists between people around the world, and even within a country. The digital divide is associated with the use of other devices such as telephones, televisions, and cellular phones. The world is becoming computerized very fast, and those who have access to computerized equipment are getting ahead. Those who don't get it are left behind. That is, the gap between those who are computer literate and those who are not is known as the digital divide. Causes of the increasing digital divide: In the last ten years, significant improvements have been made through the Internet. Today there are over 1 billion websites on the internet and billions of users are using the internet. As informa...

A wallet that's means online money bag. Every online wallet has an encrypted address. There are two types of wallets. 1. Online wallet 2. Offline wallet 1. Online wallet: Such wallets are based on different apps. Such as blockchain app wallet, coinbase app wallet, trust wallet, uphold wallet etc. In such wallets your money is stored as binary digits. This wallet means you can't catch or touch the money, it can only be seen and transacted very securely. 2. Offline wallet: It can be your pocket or a special bag where you keep your money, dollars, pounds. It can be grasped, touched and seen.

Introduction to Open Office: Open Source or the open software forum for all is publishing and promoting an integrated software called Open Office worldwide for free use by all. Open Office is a leading general office management software for word processing, spreadsheets, presentations, graphics, database etc., which increases office productivity manifold. This software can be downloaded and used completely free of charge with the facility of use on any type of computer in different languages. Current versions of Open Office software can easily import or export data or files used in other Office suites. Open Office has the facility to save documents or files in international open standard formats. This ensures the portability of OpenOffice files. Among the various programs in the OpenOffice.org suite are -- Their word processing program is called Writer.  And their spreadsheet analysis program is called Calc. The presentation program is Impress. The database program is Base. The pa...

Digital Office Management Basics and Elements: Basis of Digital Office Management The backbone of digital office management is the resource sharing network or connectivity through which various data and information can travel securely between each entity of the office. Office management can only be completed if information and flow can be ensured between each element of the office. A secure network is needed to ensure and secure office data flow. Networking refers to interconnected sharing of resources. Secure data sharing is considered the foundation of digital office management. To exchange this secure information, the network must also be secured. Components of Digital Office Management: The following 5 components or resources are required to create a modern office management system, namely (i) Hardware Resources (ii) Software Resources (iii) Data resources (iv) Network resources (v) Human resources. Human resource: The main component or resource of the office management system is...

Difference between manual information system and computer based information system Computer Based Information System: (i) Computer based information system consists of human resource hardware, software, communication network and data resources. (ii) These systems use hardware, software, communication networks and data resources. (iii) The process of data processing is much easier, the effort is much less but the result is much more than that. (iv) It is also less time consuming and error prone. (v) collects, transforms and processes the information of an organization with the help of such information system and provides it as required by the organization. (vi) Examples of Computer Based Information Systems: Office Automation System, Management Information System, Transaction Processing System, Management Support System, Bank Management System etc. Manual Information System (i) Manual information system without computer or any other electronic equipment, making, using and exchanging inf...

 Search Engine Optimization There are many search engines in the world, such as the most famous is Google, followed by Yahoo, Bing etc. If someone wants to learn HTML in Bengali, he might search Google by writing "HTML Tutorial", because he might not know the address of any website that has HTML Tutorial in Bengali. Now let's say there is a website that has HTML Tutorial in English. Now if "HTML Tutorial" If you search on Google by writing ", the first link on the first page of Google is the site, then the user who was searching for "HTML Tutorial" will definitely go to that site. This one's site showed up first on Google, even though there are many sites, blogs, forums etc. that have HTML in Bengali, the site that showed up first had adopted some techniques, these techniques are called Search Engine Optimization (SEO). -Search Engine Optimization (SEO) is mainly of 2 types, namely-- 1. On Page (which is done within the site, ie- title tags, c...

Clasification of computer network Computer communication, information sharing, electronic mail, electronic libraries, bulletin boards, etc. using computer networks are increasing in prevalence and spread. As a result, different types of networks are used in different countries of the world today. That is why the computer networks used in the world are classified from different points of view: namely-- (a) Classification of Networks by Ownership : (i) Private Networks and (ii) Public network. (b) Computer network according to type of work According to the type of work computer network can be mainly divided into three parts. These are- (i) Peer-to-peer network (ii) Client-server network (iii) Hybrid network (c) Classification of networks according to geographical extent : (i) Personal Area Network (PAN) (ii) Local Area Network (Local Area Network-LAN) (iii) Metropolitan Area Network (MAN) (iv) Wide Area Network (Wide Area Network-WAN) In general, network segmentation refers to the classi...