pithy definition: In library and information science controlled vocabulary is a carefully selected list of words and phrases, which are used to tag units of information (document or work) so that they may be more easily retrieved by a search. The key point to impress is that the list is "carefully selected", which means that a person or group must deliberately decide on those words and phrases, prior to their use. A controlled vocabulary is not an automatic comprehensive set of all things of a
that "Primary key cannot have NULL value" Referential Integrity: States that "Foreign Key can be either a NULL value or should be Primary Key value of other relation. 17. What are super, primary, candidate and foreign keys? A superkey is a set of attributes of a relation schema upon which all attributes of the schema are functionally dependent. No two rows can have the same value of super key attributes. A Candidate key is minimal superkey, i.e., no proper subset of Candidate key attributes can
instead give it ID for instead ‘S01’ the ID will become the primary key in which we can identify each supplier by the ID. The advantages are that it will take less time to search it on the database in addition to a reduction in the amount of data being kept & input. Plus it could also guide the user in which e.g. selecting the right
1. If I were to design Ben & Jerry’s data warehouse I would use several dimensions of information. The first dimension would consist of the company’s products; ice cream, frozen yogurt or merchandise. The marketing department has to know which products are selling, if Ben & Jerry’s didn’t know that their T-shirts are selling out as soon as they hit the stores, then they wouldn’t be able to take advantage of the opportunity to sell the shirts. The second dimension would consist of the different
others around the world, have implemented encryption regulations to due to the influence of the U.S. but have restrictions that are far more stringent and harsh. The strong regulations by these countries are creating conflict among private users and foreign companies that export encryption software to these countries. This argument and debate continues between the government, businesses, and encryption companies. The question is should the government have the right to monitor and regulate encryption
Tables have key fields, which can be used to identify unique records. Keys relate tables to each other. The rows of the relation are also called tuples, and there is one tuple component for each attribute – or column – in that relation. A relation or table name, along with those relation’s attributes, make up the relational schema. Relational Database models are server-centric. When designing a Relational Database, you must create a table for each entity type, choose or invent a primary key for each
Jefferson Wheel Cipher: During 1700’s Thomas Jefferson invented a cipher system that is almost similar to Vigenere cipher but with improved security. The system had 26 wheels with alphabets that are randomly scattered on them. The key for the system is having the wheels in ascending order. The cipher text is any other line found by aligning the wheel with a line that has the plain text or message. While decrypting the message the cipher text are aligned first then the all other lines are scanned
as she says ‘’Now were on home ground foreign territory’’. This links in with one of the key divisions in the story between the Americans and the Canadians that is portrayed throughout the book. This paradoxical declarative reveals that the protagonist feels she should belong there but feels detached from this childhood place, suggesting she may feel alienated from this place revealing something oppressive about this home ground. Also David is the key person who emphasizes this division between
1. Introduction: Globalization and advancements in the internet and information technology laid paths to new ways of communication. Countries separated through oceans united through Internet and Web. Gone are the days where data and information was stored on papers. Now, everything is stored electronically which is more reliable and secure. As the data is growing in multiple folds, Security issues are also growing at the same speed raising the concerns about its security. Though, Regulatory bodies
Keys to Success for the Final The final will have a total of 35 questions and there will be 6 questions on Ch. 7, 6 questions on Ch. 8, 7 questions for Ch. 9, 2 questions on Ch. 10, 7 questions on Ch. 7, and 8 questions on Ch. 8. Know the environmental factors and why they are important in determining where to settle. Be able to recognize and name the various geographical features within these areas of study. Be able to contrast the living patterns between the Canaans and Egyptians and Kushites
Around 3:00 pm on Sunday April 11, 1993 a riot started when prisoners returning from recreation time attacked prison guards in cell block L. The guards held the keys to the entire cell block and it did not take long for the prisoners to take full advantage of the keys. Four beaten guards were released within hours of the attack but 8 were retained. The riot was started for many reasons but the most obvious reason was TB testing on Muslims, they do not believe in using needles to take blood or for
everybody else, and certificates for stores. This summer, I went to the Keys with my family. I drove down there with my wallet and took it everywhere with me, like I would any other time. Well, when someone doesn't have pockets, then it is hard to keep their wallet right next to them at all times. I was carrying my wallet out from the hotel, along with my keys, and set both on top of the car. When I figured out that I needed the keys in order to get in the car and turn it on, I took them off the top of
to original message or data. ・Authentication. The process how to distinguish individual, the machine of network or the organization. ・Digital Signatures. It bundle the specific key and the message which will transmit. Then transmit the scrambled message with the specific key which is uses for decipher. And the key itself is encrypted... ... middle of paper ... ...ypted the message first in order to prevent other person's interception. When the right person received the message, he will decrypt
Face-to-face education is slowly becoming a thing of the past, while “convenience” is becoming more common. Many students are trying to find a balance between family, work, and school therefor participating in online courses has made it easier for students to accomplish their goals, while still maintaining their day-to-day lives. Although this sounds great for some students, distant learning is definitely not meant for all. Self-discipline plays huge factor when participating in online education
knowing how far into the n-bit key stream it is. One problem is error propagation in the self-synchronizing, a garbled bit in transmission will result in n garbled bits at the receiving side. Synchronous stream ciphers generate the key stream in a fashion independent from the message stream but by using the same key stream generation function at sender and receiver. While stream ciphers do not propagate transmission errors, they are, by their nature, periodic so that the key stream will eventually repeat
The Oddly Shaped Box – Module 5 Assignment Jade stepped lightly on the attic ladder rungs. She tried to keep the loud creaking noises to a minimum. No one was home. it wouldn’t have mattered anyway. The attic was foggy from dust, and the fragrance of candles, old newspapers, and pine permeated the air. From the window a beam of light in the odd shape of an obelisk washed across the wooden floor and landed directly in the corner. Jade was drawn in that direction, not knowing why. She thought that
approaches and expectations of a community dealing with a disaster differ significantly. ERIKSON’S APPROACH (historical groundwork, relationship to land, choices we make) The most notable difference between these two approaches happens to also be a key factor within both disaster events. Erikson’s conceptual approach to studying disaster and community relies highly on historical groundwork. Erikson stresses the importance behind his approach is to be able to understand what a certain place was like
plaintext is mended by computing D(C) = P. Different kind of encryption techniques is as follows. Symmetric Key Cryptography: Symmetric Encryption is a one of the technique in cryptography for encrypting the text, images etc. The method of encryption and decryption in Symmetric cryptography hang on the secret key, which is shared between the two parties (i.e. Sender and Receiver). Secrete Key(K) Plain Text (P) Cipher Text (C) Plain Text (P) Figure 1: Model for Symmetric Encryption
employment; he was exhausted. Picking the shining thing up he observed that it was a gold skeleton key. My lucky day he said to himself. But what would a gold key unlock.. Dropping the key into his shirt pocket he continued his walk down Parker street contemplated whether to sell the key quickly at the nearest pawn shop or try to find the person who lost it, just to find out what a gold key unlocks. The knew key would render him a few quick dollars if he sold it, however he decided on trying to find the
Yes, you have your right to privacy under the Fourth Amendment, but if the government can do something to ensure your safety, then that needs to happen. A “full-key” encryption would grant more privacy then we would need, allowing more crime to happen because now the government can’t see as much as they used too. Terrorists are becoming more and more tech savvy and now using it more than ever to communicate across