Union and Intersection

Primary Task receipt Write at least 3 paragraphs that respond to the following questions with your thoughts, ideas, and comments. Be all important(p) and clear, and occasion characters to reinforce your ideas. Part I Describe how the notion of union and lap apply to retrieving records in databases. Give an example of 2 doctors that might appear in a database to help in your description. A prominent couple is found dispatch in their mansion located in an affluent neighborhood. The basekeeper found the bodies and called the guard.The housekeeper tells the detectives that quite a few valuables are swinging from the house artwork, electronics, jewelry, cash etc. In the initial stages of the investigation the detectives burn downnot decide whether this was a looting gone wrong or a murder the perpetrator tried to suppress into a robbery. Not wanting to miss any potential leads the police compiles a joint list of comicals every suspect on this list is either a known robber or a known killer (or both). For the first set R=x x has a robbery rap sheet they ingress the Theft/Robbery Division database.For the siemens set M=y y has a murder in his unlawful record they access the Homicide Division database. It is not uncommon that different divisions within the homogeneous police department maintain different databases. Although state and national databases do be they are usually slow mournful and most often than not they pass on unmanageably long lists of suspects. The ad new wavetage of a local database consists in a frequently easier access and go forthput which is oftentimes more than more relevant to the investigation in 99% of the cases the crime is perpetrated by a local suspect.Thus the initial set of suspects S is the union of R and M S=R? M. Suppose however that S has too many suspects. Given the personnel department shortage it is not feasible to enquire every name which appears in S. the police needs to find a charge to delineate dow n this list. After re-interviewing the neighbors, it turns out that one of them witnessed a suspicious color Chevy van idling on a street corner close down to the murdered couples house. The van was in a rough make for which made it unlikely to be owned by one of the local residents.The detectives make up now a clue that helps them narrow down their list of suspects. They access the DMV database to pick the list of drivers who own an older regulate verdure Chevy van. In early(a) words they retrieve the set C= z z owns a green Chevy van. The investigators then equivalence their list of suspects S , to the name calling listed in C, looking for common entries. In some other words they are interested in the set of prime suspects P, where P is the production between S and C P=S? C. Part II hold forth the notion of the discursive or and the sensible and in computer programming (coding) or flowcharts.Why is it important to know how to apply these decently? The traditional scope of computer scholarship was the automation of numerical trading operations. But since ratiocination commode be seen as a kind of computation, in principle it can be automated as well. Computers fight back information exploitation microprocessor chips. A bit is a symbol with two assertable values, zero and one. The word bit comes from binary star digit, because zeros and ones are the digits apply in binary representations of numbers Computer bit operations correspond to the logical connectives.Information is represented using bit fibrils, which are lists of zeros and ones. Operations on the bit strings can be used to manipulate this information. At a very basic level, the binary string approach accompanied by the operations that can be performed with these strings via the logical connectives constitute our way of translating the problem in a form the computer can understand. Eventually, the computer is the perfect executant so it will end up doing simply what we t old him to do which is not always the very(prenominal) with what we intended to have him do.The difference between 0 and 1 may not seem large however, in direct terms is as large as the difference between true and false, or the difference between black and white. The use of 0s and 1s is a matter of convenience if anything else alternatively we can work with dinks and dunks with exactly the analogous (logical) result. A quick example is most likely going to drive this head teacher home. One of the places where logical connectives are used most frequently are the meshwork hunt club engines. Suppose however that by a silly programming fault a certain search engine XYZ. om reads or instead of and and vice-versa. Suppose your teacher recommended an article written by Jones and metalworker on the topic of logical connectives. The teacher could not remember the authors first names nor the exact title of the writing plainly he suggested that a quick search on XYZ. com should help you locate the paper in no time. Needless to utter if your search query Jones AND metalworker AND lucid AND connectives is interpreted as Jones OR Smith OR Logical OR connectives the chances of status the paper are just as great as the chances of finding thr goad in the haystack.