User permissions

Folder Security. As with our brick and mortar analog, entrance to the file room does not grant you free access to all the holdings. A folder may be accessible to a specific class of user. User permissions over folders are typically limited to NONE, BROWSE, or READ. The ability to CREATE folders is typically the restricted province of the EDMS administrators. 

Incorrect implanentation of user permissions - IDA could occur as a result of a system defect whereby access is prevented for a user whose permissions are set quite correctly. 

W2, which displays the results of the execution of the user instructions and commands, and W3, which displays the models and model elements in visual form so that user can select interactively from this list to perform any required model manipulation. MUI includes an intelligent parser that provides online syntax options for both the syntax of the instructions and the parameters retrieved from the central model repository. For example, while user is typing Gr system shows a list of instructions that start with Gr i.e. Grant Access (based on the user profile and domain). Once user selects Grant Access , system will type Model Name= , followed by a list of existing model names available in the model repository (based on the user permissions and security levels). Sample functions offered by MUI can be viewed in table 5-2. 

For worker exposure to trichloroethylene vapor, OSHA set a maximum eight-hour time-weighted average (TWA) concentration of 100 ppm. This severely restricted certain appHcations, and many organizations converted to other chlorinated solvents. As a result, U.S. production of trichloroethylene declined about 70% from a peak in 1970 (Table 2). In 1989, OSHA lowered the permissible exposure limit (PEL) from 100 ppm eight-hour TWA to 50 ppm eight-hour TWA (33). This added further pressure for some users to consider changing to alternative solvents. 

When the pressure rises to the permissible maximum, the cartridge must be opened and the element replaced. Micronic elements of the fiber type cannot be cleaned and are so priced that they can be discarded or the filter medium replaced economically. Stone elements usually must be cleaned, a process best accomplished bv the manufacturer of the porous ceramic or in accordance with the manufacturer s directions. The user can clean stainless-steel elements by chemical treatment. 

Caution Due to the permissible tolerance on the outside diameter immediately behind the tubing upset, the user is cautioned that difficulties may occur when wraparound seal-type hangers are installed on tubing manufactured on the high side of the tolerance therefore, it is recommended that the user select the joint of tubing to be installed at the top of the string. 

Gas pipework in a user s premises serves the function of transporting the gas from the meter to the point of use in a safe way and without incurring an avoidable pressure loss. For low-pressure installations, the permitted pressure loss is only 1 mbar from the meter to the plant manual isolating valve at maximum flow rate. The pipework must be sized adequately to allow for this. Boosters are sometimes used to overcome pressure losses, but the use of a booster should never be considered a satisfactory substitute for correct design of pipe sizes. Where gas is available at higher pressures it may be permissible to tolerate pressure losses of more than 1 mbar. 

H. Safety considerations. The Occupational Safety and Health Administration (OSHA), US Department of Labor, standard entitled Occupational Exposure to Hazardous Chemicals in Laboratories (29 CFR 1910.1450) makes it necessary to address safety issues in the SOP. The standard requires laboratories that use hazardous chemicals to maintain employee exposures at or below the permissible exposure limits specified for these chemicals in 29 CFR Part 1910, Subpart Z. Hazards associated with any specific chemicals used in a method must be addressed so that the user has the information needed to follow the Chemical Hygiene Plan for their laboratory. The method developer should limit the use of hazardous chemicals where feasible. The use of toxic and/or carcinogenic reagents should be avoided or eliminated as much as possible. Additionally, the cost of disposal is increasing and could impact the practicality of a method. Material Safety Data Sheets for the analyte(s) and any unusual or hazardous reagents should be provided for the user. 

After Bengtson [157]. From A. Bengtson, in Surface Characterization. A User s Sourcebook (D. Brune et at., eds), Wiley-VCH, Weinheim (1997), Chapter 14. Reproduced by permission of Wiley-VCH. 

These models employ continuous, rather than single event, simulation. The advantage is that continuous output can be analyzed statistically. The user can obtain answers to questions such as "For what fraction of time will the concentration of X be above Y mg/1 at point Z in the system " Or, "What danger does chemical X pose to species A at locations B and C ". These are the kinds of answers needed if he is to make rational decisions regarding the permissible uses of chemicals for agricultural purposes. 

According to EPA s National Compliance Report for calendar year 1996 (EPA 1998g), the vast majority of people in the nation received water from systems that had no reported violations of the maximum contaminant level and treatment technique requirements or significant monitoring and reporting requirements. Lead has a maximum permissible level of 15 pg/L delivered to any user of a public water system. Lead and copper are regulated in a treatment technique that requires systems to take tap water samples at sites with lead pipes or copper pipes that have lead solder and/or are served by lead service lines. The water system is required to take treatment steps if the action level (15 pg/L for lead) is exceeded in more than 10% of tap water samples. For calendar year 1996, nearly 6 million people in the United States were served by community water systems that reported maximum contaminant level and treatment technique violations of the Lead and Copper Rule (EPA 1998g). 

Figure 1. A single command allows Che user Co creaCe a new column in an RS/1 Cable as a transformation of existing data. (Reproduced with permission from University of South Carolina Press Columbia, S.C., 1986 Channing Russell In Research Data Management in the Ecological Sciences Michener, William, Ed. pp 373-381.)...

---