Tag Archive for Technology

Advantages and Disadvantages of Mainframe Systems

Mainframes are typically used by large-scale industries to perform/process their critical business applications. Earlier, these mainframes used to occupy more space and a separate cooling systems had to be provided to keep these mainframe systems cool. However, now a days, these computers are in smaller in size with capability of giving high computing performance. Based on the business requirements, mainframes have certain advantages and disadvantages.


  • Mainframes can process massive amount of data at a reliable speed for years without any interruption.
  • They handle large volumes of data for storage as well as for processing.
  • All the applications and data are stored in a single mainframe such that it is easier for admin to administrate all applications.
  • Mainframes acts as a central computer that can alone finish the work of some hundreds of smaller PCs, that eventually helps in lowering the administrative and management costs.
  • Mainframes are more stable than other computers.
  • Multiple operating systems can run mainframes such that it allows organization to run multiple processes with a reliable speed, security and operating power.
  • Mainframes allow users to access data from remote terminal devices, that doesn’t have any processing capabilities.
  • You can also design web based applications with security features.


  • Mainframe computers are costlier.
  • Mainframes occupy more space as well as generate more heat and require cooling devices to keep mainframe computers cool.
  • Installation of mainframes is complex because of their devices are different from regular devices set up.
  • More attention is required while operating.

These advantages and disadvantages would help you decide whether mainframes are really needed for your business/firm or no.

The New Generation computing – “Cloud Computing”

The word “cloud” in cloud computing has actually derived from the figure of cloud which is used to represent the internet traditionally. In simple terms, cloud is nothing but a kind of super computer containing huge number of applications, servers, permanent data storage devices etc. Cloud computing was used or the first time in 2006 by AWS (Amazon Web Services). This is becoming more popular and most of the organizations are willing to adapt it because of its easy maintenance, security and high availability.

Architecture of cloud computing:
The architecture of cloud computing is as simple as any client-server model containing three major components. The major difference between the client-server model and cloud computing is the server side. The server side of the client-server model is just one computer or an application. Whereas in cloud computing the server is the cloud. The three major components of cloud computing are

  • Front end
  • Connection/ Network
  • Back end

Basically, front end is the hardware devices and the application or software which is used to access the cloud computing services. The hardware devices can be a Personal Computer (PC), mobile devices or a network.

Connection or network is the component which connects the front end and back end together. This is usually an internet.

Back end is the actual cloud which comprises large number of computers, massive data storage and servers. Cloud can be best understand by the figure:

Categories of cloud computing:
There are three important categories of cloud computing. They are

  • Public cloud
    In public cloud, all the resources are available to the users free of cost. There are also some public cloud which offers services based on pay-per-use policy.
  • Private cloud
    Private cloud is the cloud which provide the services to the users who pay for them.
  • Hybrid cloud
    Hybrid cloud is the mixture of both private and public clouds.

Types of service models:
There are four important service models in cloud computing. They are:

  • Infrastructure-as-a-Service (IaaS)
    In this model user can request for various things stored on the cloud like servers, data storage devices, applications etc.
  • Software-as-a-Service (SaaS)
    In this model, user can request for a software o an application and pay for it instead of buying the whole software and again paying fees for license and updates.
  • Platform-as-a-Service (PaaS)
    In PaaS model user requests and pay for the server or a platform to run and execute their developed products.


  • Efficient
  • Fast
  • Easy maintenance
  • High availability
  • Cheaper


  • Varying cost
  • Loss of control
  • Constant internet connectivity

It is appreciable to update individuals or organizations with latest technologies emerging these days. But it is equal important that it should always be kept in mind the security of the confidential information. It is best practice to keep a backup of all the data which is stored on the cloud. In case if it breakdown, the server of the cloud should be able to retrieve all the data back from the place where it has stored. Otherwise the data is all lost without being processed. Cloud can be considered as the management than as a location. Because, the cloud not only just stores the information but it manage and maintain the all the information on it.

Cloud computing is such a technology which minimizes the cost and tedious work of maintaining. No doubt there are many security issues in his new concept and the users doesn’t feel comfortable sometimes. So, getting the assurance of security for confidential data from the service providers, cloud computing is adaptable.

Architecture of Cloud Computing

The cloud computing architecture is a simple as client-server model architecture. It contains three major components like front end, connection and back end. In client-server model, the client computer is connected to the server with a cable or the Internet. The server might comprise a computer device or a group of computers connected within a network. In cloud computing, the server is a cloud that contains almost all computer programs. It is a huge collection of servers, applications, permanent data storage devices etc. The cloud computing architecture has components of

  • Front end
  • Connection/Network
  • Back end

Front end
Basically, the front end is the hardware devices and the application is installed in that device, which is used to access the cloud computing services. The hardware devices can be a personal computer (PC), mobile devices or even a group of devices connected together as a network. In other words, the front end is the user side. The user sends the request for service through that hardware device. The application installed in the hardware helps process the request and send it to the next component that is, “connection”.

The connection or network is the component that connects the front end and back end together. In simple words, the connection/network is the mediator between the front end and the back end. It carries the transactions to and fro. This is usually done via the Internet. (Remember cloud computing always needs constant Internet connection). This component carries the request which is processed and sent by the front end to back end. It then carries the service which is delivered by the cloud to the user.

Back end
The key component in the architecture of the cloud computing is the “cloud”, which is a back end. Back end is the actual cloud which comprises large number of computers applications/services, a massive data storage facility, infrastructure and different servers for executing the programs. “Cloud” contains almost all the computer programs practically used for various purposes. A cloud can also be the group of clouds called sub-clouds. These sub-clouds can be either private clouds or public clouds.

  • Private clouds are the those that are owned by the enterprises. Some private clouds cannot be accessed whereas a few private clouds can be accessed and use the services of it by paying the owner of that cloud.
  • In contrast, the public clouds are accessible by all users. Most of the services on it are free, while few are paid-services.

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Advantages and Disadvantages of Office Automation in Business

Office automation is a great way of using computer machinery and software to perform office works to digitally create, collect, store, manipulate and relay office information needed for accomplishing basic tasks of a business. It helps save money and time while protecting your important business information because it makes your work less tedious, trim hours off your workload, reduce repetitive keyboard strokes or mouse-clicks and make data entry easier with fewer tabs or mouse movements. However, opting automation in business has its own advantages and disadvantages.

Here are the advantages and disadvantages of office automation.


  • Automating business processes will reduce reduces your participation in clerical tasks such as organizing data, creating reports etc and helps you to concentrate in important parts of your business.
  • It allows to perform the tasks of many people.
  • It allows people to work on higher-level tasks.
  • It avoids space for duplicate data, helps in fast data retrieval, and at the same time that data can be accessed by many employees.
  • Increase business competitiveness.
  • Helps management make better decision-making and planning.


  • It is expensive because you have to invest equipments.
  • Previous or older staff or less-skilled people may take some time or face problems in adjusting to the new technology and may find difficult to use it efficiently.
  • If anything is misfiled, it might be harder to find.
  • Entails maintenance costs for equipment.
  • You might need some additional training on how to operate.
  • If automated system would not work properly due to some reasons, then you are unable to continue your business manually also.

Based on the above advantages and disadvantages, you should opt for office automation.

Get to Know about Types of HVAC systems

ID Fan manufacturersHVAC (Heating, Ventilation and Air Conditioning) systems are designed to perform four main functions – heating, cooling, ventilation and controlling humidity levels. HVAC systems are designed to meet goals of its customers and satisfy them in terms of efficiency of system and saving energy. Many HVAC systems are available today and are designed for both homes to industries. Selection of HVAC system is critical because improper selection may cause discomfort in terms of health and loss of money. This article tells you about types of HVAC systems.

Though there are many type of HVAC units, there are four broad categories.

Constant air volume (CAV) HVAC systems

Constant air volume HVAC systems work by use of constant supply of air volume by distributing hot or cool air. Constant air volume HVAC systems are installed in large spaced rooms (auditoriums, theaters, lobbies, hospitals, manufacturing units, etc.). There are three variants of CAV systems: single duct, reheat and multi-zone systems.

  • Single duct system: A single duct CAV is a simple central air conditioner with single zone distribution for either cool or hot air throughout the building at a fixed temperature (usually 55O F). This fixing of temperature allows to maximize cooling load in all spaces.
  • Reheat system: The reheat system is modified single-zone distribution system that uses electricity or water to heat coils. Reheat coils reheat the cool air flow and distribute controlled air throughout the building. It is used in hospitals, laboratories and other buildings, which require wide load variation.
  • Multi-zone system: Multi-zone system has two distribution systems, one for heating and other for cooling. Both ducts are designed to meet at one place called “mixing box”. This mixing box controls and distributes the required air temperature throughout the building.

Variable air volume (VAV) HVAC systems
Variable air volume systems are economical to install and are more energy efficient to bring down the cost by 10 to 20% compared to constant air volume systems. This system is best to meet varying cooling and heating needs of building areas.

The design of VAV system is simple and has small units that make installing easier. The main air duct provides cooling at 55O F and this is called primary air. A thermostat controls the temperature of primary air delivered to each room. This modulates the volume of air supply to get the required room temperature in different rooms according to cooling needs.

The main advantage of using VAV comes by its efficiency in dehumidification and temperature control by fan that efficiently reduces over all cooling or heating bills.

Radiant air conditioning (RAC) HVAC systems
Radiant air conditioning system refers to temperature controlled surface (hot/cold water or electrical heating coils tubing) that heats or cools indoor air temperature before air goes into the room. Radiating air conditioners install metal tubing on the surface of ceiling or walls of home or offices.

In this system, as air passes through metal pipes along the the concrete ceiling or walls, it gets warmed or cooled before it goes into the indoor environment. From these tubing, heat or cooling is transferred from ceiling or walls to warm the indoor air. The use of RAC has many advantages – no duct work is required, quite and energy efficient, no need of cool air exchanger, zoning capabilities and finally even temperatures for comfort. RAC is a power saving system that allows users to get comfortable temperature at home under lower temperature.
Advanced radiant RAC systems make it possible to control individual room in buildings. There are different types of radiant air conditioners and the most common types are electrical and gas fired systems.

Zoned System
Zoned system is a single area where temperature is regulated by singe thermostat. If a building’s temperature is controlled by a single thermostat, it is called single-zone. When multiple thermostats are used in a building, it is termed as multi-zone system.

In single zone HVAC system, single thermostat maintains same room temperature across different zones of same building. While in multi-zone system, each room is equipped with one thermostat to receive air with different temperatures based on the need of users.

Multi-zoned system is more advantageous over single-zone, as multi-zone system can efficiently control air-conditioning requirements. They are able to direct hot or cool air for certain rooms when needed. This offers wastage of power utilization for cooling or heating your building.

Use of zoning system enables you to save around 30% or more cooling/heating on power bills. Since zoned HVACs run based on your requirements at single or more rooms, it makes HVAC to run at lower speed and thus run quietly, and hence ergonomically good.

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