User tolerance

This is sometimes referred to as user tolerance to the distress symptoms displayed by the machine. User tolerance is really a catch-phrase to describe those people who, based upon their individual level of expertise , will determine that the defective machine can keep on running at a level of severe vibration as opposed to those who would take the machine out of service immediately. 

For applications where the battery will be used frequently (assuming that both primary and secondary batteries are capable of meeting the power requirements of the equipment), the choice should depend on user preference. Will the user opt for the convenience of the primary battery and freedom from the charger, or will the user tolerate the inconvenience of the rechargeable battery and opt for its possible lower operating cost ... 

The hardware and software used to implement LIMS systems must be vahdated. Computers and networks need to be examined for potential impact of component failure on LIMS data. Security concerns regarding control of access to LIMS information must be addressed. Software, operating systems, and database management systems used in the implementation of LIMS systems must be vahdated to protect against data cormption and loss. Mechanisms for fault-tolerant operation and LIMS data backup and restoration should be documented and tested. One approach to vahdation of LIMS hardware and software is to choose vendors whose products are precertified however, the ultimate responsibihty for vahdation remains with the user. Vahdating the LIMS system s operation involves a substantial amount of work, and an adequate vahdation infrastmcture is a prerequisite for the constmction of a dependable and flexible LIMS system. 

Similarly, airborne emission limits have been estabHshed by the NRC for nonrestricted areas. Limits of surface contamination must be estabHshed to provide a safe workplace for users (19). The appHcation of the as-low-as-reasonably-achievable (ALARA) principle to the above draws on the creative talents of the user to regard the limits as nonapproachable barriers and not as tolerable maxima for discharge. 

The error term in the various methods can be used to deduce a step size that will give a user-specified accuracy. Most packages today are based on a user-specified tolerance the step-size is changed during the calculation to achieve that accuracy. The accuracy itself is not guaranteed, but it improves as the tolerance is decreased. 

Specifications include dimensions of length, width, and depth, in that order (Fig. 21-40 ). When boxes are set up and closed by automatic equipment, dimensional tolerances become critical. Cartons are shipped knocked down to the user from plants located in all industrial centers. Because order lead time is 4 to 6 weeks, inventories of empty boxes require considerable space. A useful booklet describing all aspects or corrugated box designs and materials is the Fiber Box Handbook available from The Fiber Box Association, 2850 Gulf Road, Rolling Meadows, IL 60008. 

For many years the usual procedure in plant design was to identify the hazards, by one of the systematic techniques described later or by waiting until an accident occurred, and then add on protec tive equipment to control future accidents or protect people from their consequences. This protective equipment is often complex and expensive and requires regular testing and maintenance. It often interferes with the smooth operation of the plant and is sometimes bypassed. Gradually the industry came to resize that, whenever possible, one should design user-friendly plants which can withstand human error and equipment failure without serious effects on safety (and output and emciency). When we handle flammable, explosive, toxic, or corrosive materials we can tolerate only very low failure rates, of people and equipment—rates which it may be impossible or impracticable to achieve consistently for long periods of time. 

Since derivations and literature references are typically not given in detail (often not at all) it is difficult for users to recognize errors or assess the validity of some statements when applied to a particular situation. It would be helpful for the user to appreciate limitations of applicability and to consider risk tolerance when adopting a specific practice based on minimum safe practices given in codes. 

Current policy in API is to avoid commercial language in the API standard. API standards do not include a guarantee and warranty section. In the revisions, as they occur, other paragraphs deemed commercial are disallowed. This puts the burden of guarantee and warranty verbage on the user. A practical solution, if the user is not familiar with industry practices, is to solicit from the vendor a proposed guarantee that should be a zero tolerance on head and capacity. This would only be good prac-... 

A change was made back to copper. It is more user friendly than aluminum and will tolerate cleaning or scratching of the surface. 

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. 

These SPI tables can also be used as the basis for establishing standards for molded products between the designer, molder, and customer. Users will find that two separate sets of values are represented. Commercial values represent common production tolerances that can be achieved at the most economical level. Fine values represent closer tolerances that can be held, but at a greater cost. The selection of one or the other will depend on the application under consideration and the economics involved. 

The generation of clean, uncontaminaled steam is a fundamental objective for all facilities. Most users also require the steam to be as diy as possible, although certain applications can tolerate or even require wet steam. 

ACETAMINOPHEN. Acetaminophen is usually well tolerated, and few adverse reactions are seen if die drug is given in recommended amounts. It is important not to exceed die recommended dosage of acetaminophen. If die patient is an alcoholic or chronic user of alcohol, acetaminophen intake is limited to no more tiian 2 g/d. 

Perera KM, Jenner FA Some characteristics distinguishing high and low dose users of benzodiazepines. Br J Addict 82 1329-1334, 1987 Perez MF, Salmiron R, Ramirez OA NMDA-NRl and -NR2B subunits mRNA expression in the hippocampus of rats tolerant to diazepam. Behav Brain Res 144 119-124, 2003... 

DSM-IV-TR (American Psychiatric Association 2000) criteria for hallucinogen intoxication are presented in Table 6-3. The normally used quantity of LSD ingested ranges from 30 to 400 pg, but doses as low as 20 pg may cause clinically detectable symptoms (Strassman 1984). However, tolerance to the effect of LSD develops relatively quickly, so that chronic users increase their dose over time. 

True. Many users of drugs become tolerant to them. This means that more and more of the drug needs to be taken to achieve the desired effects. Also, more drugs equals more cost. 

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