Read-access

Figure 2. Schematic drawing of the interpreter. The program is represented by the area inside the solid rectangle. Program modules are drawn as circles, and their associated databases as rectangles. All of the modules have read access to the Chemical Classes database.

Although the following example has been used by other authors in different contexts, I do not hesitate using it here again to demonstrate how to build systems with better abstractions. The reason is it uses the Java Collection Framework—a Java class library that is familiar to many developers and the framework itself is a good example of encapsulation. Suppose you want to design a compound library class that contains a list of individual compounds. Also suppose that the clients of the CompoundLibrary class need read-access to the compound list and the developer decides to use ArrayList to hold the compounds inside the CompoundLibrary class. A naive implementation of the CompoundLibrary class is as follows ... 

In Windows 2000, an access control list (ACL) is a list of security protections that apply to an entire object, a set of the object s properties, or an individual property of an object. Each Active Directory object has two associated ACLs The discretionary access control list (DACL) is a list of user accounts, groups, and computers that are allowed (or denied) access to the object A DACL consists of a list of access control entries (ACEs), where each ACE lists the permissions granted or denied to the users, groups, or computers listed in the DACL. An ACE contains a security identification with permission, such as Read access, Write access, or Full Control access. The... 

Test results are entered into the mainframe computer according to each devices identification number. Employees have read access to the records at over 500 terminals and personal computers throughout the complex. 

Once a loop has been prooftested, the results are entered into the mainframe computer, along with the date tested and the condition found. Many employees have read access to this data on many terminals throughout the complex, but only authorized personnel have... 

Users should only have read access to spreadsheet applications. All templates should be password protected. The password should not be identical with the NT password because the spreadsheet password does not age. The system owner needs to administer the passwords. If there is no authorization via the operating system (insular workstations), the system owner should define and administer the Specific access authorization. Group access should not be allowed. Only cells receiving an entry should be unprotected (unlocked). Macros need to be hidden and protected from user manipulation. 

The challenge of cross-domain integration is the replacement of the aspect of common data storage in a single database by the notion of information association across system and domain boundaries. The association between related information becomes additional external information. It is not sufficient to build up this relationship once and for ever. Whereby read access seems straightforward it is required to manage this association as an additional constraint, which needs to be taken into account for data access operations like update and delete. This additional reference information is used to realize the further use cases like where-used search,... 

When reading, a row address is given first, followed by the row address strobe signal RAS. RAS is used to latch the row address on chip. After RAS, a column address is given followed by the column address strobe CAS. After certain delay (read access time) valid data appear on the data Hnes. Memory write is done similarly to memory read with only the read/write control signal reversed. There are three cycles available to write a DRAM. They are early write, read-modify-write, and late write cycles. Figure 8.64 shows only the early write cycle of a DRAM chip. Other write cycles can be found in most of the DRAM databooks. 

If using an electronic diary, consider giving the administrator, team leader and consultant read access . This ensures they know what you re up to, and can cancel appointments if you re off sick. 

We can remove this problem by recasting axiom (1) as two axioms, one for read access and one for write access ... 

The FBI report Handgun Wounding Factors and Etfectiveness written by Special Agent Urey Patrick is a bit dated - July 14,1989 - but Is still Idea-current and makes for fascinating reading. Access it on line at www.firearmslactical.com/pdf/fbi-hwfe.pdt. 

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