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Computers
This category includes questions and answers about computers and everything related to computers.
48,002 Questions
What is the thing that is really important to a computer?
SPEED can be considered as the one most important thing while describing Computer. This is mainly the speed at which CPU (Central Processing Unit) performs calculations & is measured in Hz (MHz, GHz). Performance of Computer is also dependent on Devices, Buses & RAM (Memory) speed.
Where can one purchase an external laptop battery?
External laptop battery is specific to your computer brand. So after getting the model number to your external laptop battery, you can go to an electronic store to buy an extra external laptop battery.
Where can one find information on video editing for the computer?
There are plenty of powerful online video editing websites. I've listed some of them below.
1.magisto
2. youtube
3. evideo
4. videotoolbox
5. pixorial
6. filelab
optical reader
What is the most common central device used today to connect computers to a network?
Routers, Switches, Modems, and Hubs, but mostly Routers
What are the 4 fundamental components of a computer system?
INPUT , CENTRAL PROCESSING UNIT , SECONDARY STORAGE , OUTPUT ,
How is the computer useful to teachers?
Today Computers are used in almost every field. Whether we want to book tickets, maintain accounts or communicate with each other, computers are there to answer are every need. The question we are addressing today is-Should computers replace human beings as teachers too? My opinion is-yes they should. Not only can they do the work of a teacher but they can do it better too. In class students are often distracted by frivolities and levities. These things tend to become so important to some pupils that they lose focus on the topic that is being taught. With computers taking the role of teachers, the students will no longer have any such distraction and will be able concentrate on the subject.
The information a teacher can give may be limited whereas computers can provide information to a much larger extent. Children today are increasingly relying on computers for research and complete knowledge on any topic. Computers should replace teachers as they give complete and correct knowledge and the most updated ones. Therefore computer knowledge is an assimilation of knowledge of more than one teacher.
Another advantage of a computer teacher is that there is no possibility of a computer favoring a student over another. Discouragement and neglect will not make poor scorers of children as it so happens that many students depend greatly on the support and encouragement of their teacher. We have also observed that children have different intellectual abilities and it is through computers that they learn without being reprimanded or made to feel any less than another bright child.
It may be noted that many teachers do not want to go to remote areas or villages to educate children. Computers can very easily reach out to many more such areas.
We have also seen that trainers are either not easily accessible or are far too expensive. Therefore the advent of computer games such as Nintendo enables each and every person to receive training at home and may work out to be less expensive. We have seen that playing with computers have taken children by a storm. Thus, if given the chance, computers would definitely help students to gain knowledge.
Many organizations are selling online courses and instructions. These courses have received an immense response from students world over. This effectively reduces the number of teachers required to teach a large multitude of people.
Computers provide different views on one topic from all over the world. Thus it not rigid and it brightens the student's mind with different points of view.
A computer can memorize anything effortlessly whereas a teacher may find this rather problematic. As a result evaluation will also be faster.
What are the advantages of a computer search over a manual search?
Speed and amount searched. Computers are about a million times faster than us.
How much do US schools spend on computers each year?
100 million dollars is spent each day on computers and software!!!!
What did the past people use to write notes before computer?
Pen on paper? Pencil on paper. Quill on parchment. Charcoal on papyrus. Pigments on papyrus. Charcoal on stone. Stone on stone. Of course, notes weren't really a priority for nomadic tribes that etched symbols and images on stone inside of caves.
Four parts of a complete computer system?
Motherboard, processor, memory, storage media (Optical disc, Hard disk, or Solid state drive)
when we decide to form a network such a shortest path have to establish for data transmitting,different type of topology we have to use.
for eg:-if i hav one server or hub or a switch(one centralize device)and 15 clients
to connect ,then there are various ways to connect them according to our need...
topologies are of type:
!)star-when we need all the terminal attched to one central decice
2)ring-whn we need all terminals connect to each other also
2)mesh-combination of ring and star
4)bus-when we dont need centrliez device,onle connect one terminal to another and so on
5)hybrid-combination of all topology
Why are computers needed for mathematical models that represent weather?
Computers can crunch numbers faster than humans can and since weather scientists can pull current and past weather data from various weather authorities (like the NOAA, etc), they can plug in the data for the computer to calculate the most scientifically reasonable prediction as possible where as if we ask any average person for an accurate prediction, we cannot verify its validity or if it's scientifically possible.
When was the iBook laptop in production?
Apple produced a line of laptops called iBooks between 1999 and 2006. This line of products was priced lower and was not as powerful as Apple's other laptop that was called PowerBook. The Apple iBook was aimed at beginners including children in school.
Microsoft Office 2003 & 2007 (excel and word) to be exact.
What are the difference between operating systems for mainframe computers and personal computers?
The first obvious difference between a PC and a mainframe is their size. A PC is about 18" square and maybe 8" wide. Most people could take one apart with little or no training and install a new component like a modem or sound card. You can buy a PC at most computer stores for less than $1500 and have a relatively powerful machine. In contrast, mainframes are very large and very expensive, and you would not be able to open one up and simply add new components. They are usually installed in temperature-controlled rooms with access being limited to authorized personnel. Maintenance is usually carried out by a third-party under strict contracts. A typical PC will have one processor running at about 2.6 GHz, a hard drive with 80 Gigabytes of disk space, and 256 to 512 MB of RAM. Mainframes on the other hand, can come with hundreds of hard drives in a sophisticated RAID array with 30+ Terabytes of storage capacity and typically mainframes will have multiple processors and gigabytes of memory. Most PCs will run a Windows operating system and function as clients in a network environment while mainframes exist on
It depends on what you want to do with your PC. For school, work and daily use. The processor, storage, memory and display would need to be basic. For gaming, coding, programming, music and video editing. You would need a newer processor, use an SSD instead of HDD. You would need at least 16 gb of ram for memory and have at least 50 cm for display.
Is a LCDan input device or output device?
It is a output device. Keyboard is an input because you use it to put information in the PC. LCD which is the screen out information.
Answer 2. An LCD device is not innately an input nor an output, it is just another transducer device, in this case converting electrical signals to light signals.
It would usually be used as an output, but could be used as an input for OCR (optical character recognition).
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What is the main screen you see upon logging into the computer?
Usually the login area. If not, your desktop.
Use of computers in environmental management?
it makes life easy for environmental health, it gives comfort due to quick decemination of information
Application of Computer in Environmental Health.
INTRODUCTION:
The computer age offers unprecedented powers to obtain, analyze, and transmit information these powers are especially effective to professions such as environmental health, where networks have always been part of our work. But much of these pronouncements remain more anticipation than celebration, and the information revolution, perhaps like all revolutions, has massive casualties strewn about the cyberspace.
Within environmental health, the use of computers is hardly a new enterprise. Over the years, we have seen a wide array of applications in our field. Indeed, it is increasingly difficult to keep pace with the rapid development of computer applications in our profession.
Such challenges have lead to this series on computers in environmental health. It is part of an ongoing effort to serve the readers of this journal. What makes this effort unique from other computer references is its devotion to our professional membership. We hope to present a balanced view of computer applications, recognizing both the advantages and disadvantages of different applications to our profession. Subsequent articles will focus on specific applications, but this article addresses some of the major questions about getting started, both at the individual and institutional level.
Are computers relevant to environmental health professionals?
Given the aggressive marketing of computers in our society, it is reasonable to ask about the relevance of computers to our profession. At the organizational level, limited budgets add to the skepticism. Of course, this question is open to many answers. For example, a recent article in the Journal offered numerous uses in environmental health. Beyond that, computer tools often represent a solution in search of a problem. However, an initial answer for this series focuses on the following major categories:
* Databases.
Our growing knowledge of physical, chemical, and biological agents is being increasingly cataloged in computer databases. Often, these computerized databases are faster, cheaper, and more comprehensive than their book-bound counterparts.
* Analytic tools.
There are analytic programs in risk assessment and engineering that can enhance the work of our profession. For example, some programs guide the design and evaluation of wastewater treatment facilities. These programs extend the possible responsibilities of environmental health professionals.
* Communication.
Electronic mail can offer contacts not found through more traditional means. If you have access to a computer, all you need is a modem and communications software that operates the modem. A modern gets its name from converting digital output from a computer to signals that can travel across standard telephone lines (modulation), and converting such signals back to digital language used by the computer (demodulation). Together, this MOdulation/DEModulation is called a modem.
The speed of a modem is measured by "baud" rate, generally available up to 9600 baud on most bulletin board systems (BBS). Initial investment in a high baud rate can pay for itself. For example, 9600 baud is eight times as fast as 1200 baud. This difference can quickly pay for itself with the cost of long distance connections.
Computer-phobia
One of the biggest problems with new computer users has a special name: computer-phobia. Sometimes, this phobia becomes an oven skepticism for all computer applications. There are several strategies for dealing with this issue.
* Small steps. It often helps to take small but deliberate steps into the computer field. This series will walk you through the issues one step at a time. It will not replace the many fine manuals that are already available, but instead will assist in critical areas that affect environmental health. Rather than being overwhelmed by a massive single document, the intent is to ease the reader into the world of cyberspace.
* Cost effectiveness. A popular reference compares the jargon of computers with illegal drug use. That is, you buy computers from a dealer, after which you are a user! Both sub-cultures exhibit addictive behaviors that become increasingly expensive over time! Of course, the purpose of computers is not simply to justify more time and money for bigger computers. In the end, we should measure its usefulness by productivity--at the simplest level, this means the effectiveness of the product in light of the time and money it requires. Productivity from computer applications depends on the specific needs of different professionals, and we intend to guide the reader to the issues that may determine cost effectiveness.
IMPORTANCE OF COMPUTER IN ENVIRONMENTAL HEALTH
1. Health information technology
(HIT) provides the umbrella framework to describe the comprehensive management of health information across computerized systems and its secure exchange between consumers, providers, government and quality entities, and insurers. Health information technology (HIT) is in general increasingly viewed as the most promising tool for improving the overall quality, safety and efficiency of the health delivery system (Chaudhry et al., 2006). Broad and consistent utilization of HIT will:
- Improve health care quality;
- Prevent medical errors;
- Reduce health care costs;
- Increase administrative efficiencies
- Decrease paperwork; and
- Expand access to affordable care.
Interoperable HIT will improve individual patient care, but it will also bring many public health benefits including:
- Early detection of infectious disease outbreaks around the country;
- Improved tracking of chronic disease management; and
- Evaluation of health care based on value enabled by the collection of de-identified price and quality information that can be compared.
2.The application of GIS in environmental health sciences
Understanding the complex spatio-temporal relationships between environmental pollution and disease and identifying exposures to environmental hazards in high-risk populations are essential elements of an effective environmental and public health management program. Modern computer technologies, such as geographic information systems (GIS), provide cost-effective tools for evaluating interventions and policies potentially affecting health outcomes. GIS analysis or display of environmental health data is also helpful in explaining disease patterns in terms of relationships with social, institutional, technological, and natural environments. This paper examines major issues related to the application of GIS in environmental health sciences. Specifically, the paper presents and discusses the basic principles, potential benefits, and major limitations of GIS in environmental health research. A real-world example application involving development and implementation of a prototype system called EMPHASIS (Environmental and Public Health data analysis System) to facilitate management, analysis, display, and presentation of environmental, socio-demographic, and health outcome data in Iowa is described. From the discussions and the example application, it is concluded that GIS can significantly add value to environmental and public health data in areas such as exploratory data analysis, hypotheses generation, confirmatory data analysis, and decision-making. The widespread adoption of GIS in these areas, however, is impeded by issues such as inconsistent spatial scales of the data, data quality and currency, lack of appropriate statistical functions for data analysis and interpretation, and data security and confidentiality.
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lcp99,
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