Define and discuss the advantages of telecommuting.
What will be an ideal response?
The availability of videoconferencing, collaborative computing, and other tools (such as the Internet, e-mail, and mobile phones) has made telecommuting a viable option for many individuals. With telecommuting, individuals work at a remote location (typically their home) and communicate with their places of business and clients via networking technologies. Telecommuting allows the employee to be flexible, such as to work nontraditional hours or remain with the company after relocation. It also enables a company to save on office and parking space, as well as office-related expenses, such as electricity. As an environmental plus, telecommuting helps cut down on the traffic and pollution caused by traditional work commuting. In addition, it gives a business the possibility to continue operations during situations that may affect an employee's ability to get to the office, such as during hurricanes, during a bridge or highway closure, or during a flu outbreak.
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The relation shown in Figure 15.12 describes hospitals (hospitalName) that require certain items (itemDescription), which are supplied by suppliers (supplierNo) to the hospitals (hospitalName). Furthermore, whenever a hospital (h) requires a certain item (i) and a supplier (s) supplies that item (i) and the supplier (s) already supplies at least one item to that hospital (h), then the supplier (s) will also be supplying the required item (i) to the hospital (h). In this example, assume that a description of an item (itemDescription) uniquely identifies each type of item.
(a) Describe why the relation shown in Figure 15.12 is not in 5NF.
(b) Describe and illustrate the process of normalizing the relation shown in Figure 15.12 to 5NF.
One example of a ____ system is a human's internal heat regulation system.
A. redundant B. context-dependent C. cybernetic D. tetrad