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CS305: Fall2008 Mental and Conceptual Models Readings: Chapter 2 of ID-Book
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'Post' on Collab wiki page before class next Fri. Reminder... Use thumbnail images to preview large images. Ex. 2a, Organizing Data Display ...
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hard to learn at first. hard to keep track of variable / whole thing fails ... 4 different versions of the equals-sign / hard to distinguish on the screen ...
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Interaction style: ... May lead to high-level conceptual model for your interface. Interaction Mode and Interaction Style ... Is there a high-level metaphor / model? ...
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from the designer's perspective ... is a container that designers use to organize the ... save time and make large collections of windows easier to manage ...
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Designers are trained to consider alternatives, software people generally are not ... Software engineering is the technological and managerial discipline concerned ...
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If two things have same shape, size, color, orientation, then users will associate them ... Ink input used for data-entry. nothing on this today ...
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Better three studies with 5 users than one with 15? Usability testing ... In product design field studies can be used to: - identify opportunities for new technology ...
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Title: PowerPoint Presentation Last modified by: raj Created Date: 1/1/1601 12:00:00 AM Document presentation format: On-screen Show Other titles
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Situations where counting techniques are used ... Notation: For any finite set A, n(A) denotes the number of elements in A. Then ...
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CS 728 Advanced Database Systems Chapter 16 Database File Organization: Unordered, Ordered, and Hashed Files of Records Disk I/O Model of Computation Disk I/O is ...
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Disk Storage, Basic File Structures, and Hashing
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Data stored as magnetized areas on magnetic disk surfaces. ... in the block Slotted Page Structure Records can be moved around within a ... revolutions per minute ...
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Chapter 13 Relational Calculus,Visual Query Languages, and Deductive Databases SQL and Relational Calculus Although relational algebra is useful in the analysis of ...
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Read page containing item to buffer in DBMS (if it is not already there) ... Small page size reduce transfer time, reduce buffer size in main memory ...
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Response time average time to wait for a response to a particular query ... selection condition (they are stored contiguously since index on CrsCode is clustered) ...
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J. Kurose and K. Ross, Computer Networking: A Top-Down Approach Featuring the ... R. Stevens, Unix Network Programming, Volume 1, Prentice-Hall ...
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... Name, Address, Hobbies) A person entity with multiple hobbies yields multiple ... SSN is key of entity set, but (SSN, Hobby) is key of corresponding relation ...
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Relational Normalization Theory Chapter 8 Limitations of E-R Designs Provides a set of guidelines, does not result in a unique database schema Does not provide a way ...
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Provides a set of guidelines, does not result in a unique ... Autobrand Manufacturer, Engine type. Pontiac is built by General Motors with gasoline engine ...
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SQL in the Real World Chapter 10 Interactive vs. Non-Interactive SQL Interactive SQL: SQL statements input from terminal; DBMS outputs to screen Inadequate for most ...
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ON Transcript TO joe. on regular tables, if SQL allowed attribute lists in GRANT SELECT ... Portion of truth table: Rows are discarded if WHERE condition is F ...
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... scan: can be used for ... First approach: Find the most selective access path, retrieve ... The cost of joining two relations makes the choice of a join ...
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Selectivity of an access path = number of pages retrieved using that path ... access paths support a query, DBMS chooses the one with lowest selectivity ...
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Cursors. Result set set of rows produced by a SELECT statement ... For updatable (not insensitive, not read-only) cursors. UPDATE table-name --base table ...
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2: Application Layer. 4. Services provided by lower layers? ... Application architectures. Client-server. Peer-to-peer (P2P) Hybrid of client-server and P2P ...
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Describe how do heuristic evaluation & walkthroughs. ... Heuristic evaluation is referred to as discount evaluation when 5 evaluators are ...
