Band-stop filter

While ubiquitous Internet access is extremely convenient and enables marvelous new applications for mobile users, it also creates a major security vulnerability—by placing a passive receiver in the vicinity of the wireless transmitter, that receiver can obtain a copy of every packet that is transmitted! These packets can contain all kinds of sensitive information, including passwords, social security numbers, trade secrets, and private personal messages. A passive receiver that records a copy of…

When using information systems, it is essential to ask, “What is the ethical and socially responsible course of action?” A MODEL FOR THINKING ABOUT ETHICAL, SOCIAL, AND POLITICAL ISSUES Ethical, social, and political issues are closely linked. The ethical dilemma you may face as a manager of information systems typically is reflected in social and political debate. One way to think about these relationships is given in Figure 4-1. Imagine society as a more or less calm pond on a summer…

However, the large drop in PalmKid’s contribution margin per unit combined with a decrease in the actual number of PalmPro units sold as well as a drop in the actual contribution margin per unit below budget, led to the total contribution margin being much lower than budgeted. Other factors could be discussed here––for example, it seems that the PalmKid did not achieve much success with a three digit price point––selling price was budgeted at $149 but dropped to $102. At the same time,…

Unfortunately, some companies have mismanaged their greatest asset—their brands. This is what befell the popular Snapple brand almost as soon as Quaker Oats bought the beverage marketer for $1.7 billion in 1994. Snapple had become a hit through powerful grassroots marketing and distribution through small outlets and convenience stores. Analysts said that because Quaker did not understand the brand’s appeal, it made the mistake of changing the ads and the distribution. Snapple lost so much…