Uncertainty factor definition

Uncertainty factor or "UF" means one (1) of several numeric factors used in operationally deriving criteria from experimental data to account for the quality or quantity of the available data.
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Uncertainty factor means a value of 1, 3, or 10 that represents uncertainty inherent in extrapolating from available toxicity data to develop a Toxicity Reference Value. A total uncertainty factor is the product of all the relevant individual uncertainty factors for a specific air toxic. Individual uncertainty factors account for:
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Uncertainty factor. (UF) means the ratio of the estimated number of pounds or kilograms of nutrient load reduction by a nonpoint source to the number of pounds or kilograms of credit that will be authorized. The UF reflects the uncertainty associated with estimated credits.
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Examples of Uncertainty factor in a sentence

  • Uncertainty factor & basis, breaking down the UF into its component parts, as necessary.

  • Uncertainty Factors and Modifying Factors for Estimating Exposure Limits for Chronic Effects Uncertainty orModifying Factor General CommentsStandard ValueUncertainty factor: human (intraspecies) Uncertainty factor: animal to human (interspecies) Uncertainty factor: data gaps Uncertainty factor: LOAEL to NOAELUsed to account for the variability of response in human populations.

  • The European Maritime Safety Agency has carried out a study which has cast light on the problem of the accumulation of tasks and provided the basic data required for a detailed impact assessment.Summary of responses and how they have been taken into account There has been fierce resistance to the possible separation of tasks, with the recognised organisations themselves and most of the Member States preferring to see greater use made of vertical audits.

  • Uncertainty factor values may be considered appropriate to account for uncertainties associated with extrapolating from (1) a dose producing effects in animals to a dose producing no effects, (2) subchronic to chronic exposure in animals, (3) animal toxicological data to humans (interspecies), (4) sensitivities among the members of the human population (intraspecies), and (5) deficiencies in the database for duration or key effects (Ref.

  • Uncertainty factor (UF) – a factor used in operationally deriving the RfD and similar values from experimental data such as NOAEL or LOAEL.

  • Uncertainty Uncertainty (factor k=2) was calculated according to the DEKRA Certification internal document PODT000.

  • Uncertainty factor application and time scaling were as proposed.

  • Uncertainty factor 1.33 was applied to those estimates that was calculated using information from national level studies and national statistics.

  • Eagle (2010) 246 Cal.App.4th 275, 280.)To the extent Rivera argues remand is inappropriate because there is insufficient evidence in the trial record to prove the enhancement under the new law, he is mistaken.

  • MOE = ST/IT HEC 0.11 (mg/m3) / dose (mg/kg/day); Uncertainty factor is 10x.The dermal exposures are of concern for the induction of sensitization for paints and textiles and will need to be mitigated; leaving only the treated cleaners to be considered for the dermal aggregate.


More Definitions of Uncertainty factor

Uncertainty factor. Value used in extrapolation from a reference point (or POD), determined in experimental animals, to humans (assuming that humans may be more sensitive) or from a sub-population of individuals to the general population: for example, a value applied to the NOAEL to establish an ADI or TDI. The value depends on the size and type of population to be protected and the quality of the toxicological information available. Unscheduled DNA synthesis (UDS): DNA synthesis that occurs at some stage in the cell cycle other than the S period (the normal or 'scheduled' DNA synthesis period), in response to DNA damage. It is usually associated with DNA repair. Volume of distribution: Apparent volume of fluid required to contain the total amount of a substance in the body at the same concentration as that present in the plasma, assuming equilibrium has been attained. Weight of evidence: This approach uses a combination of several independent sources of evidence (e.g. toxicological or genotoxicity data) to arrive at a conclusion regarding potential hazard (such as mutagenicity).
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Uncertainty factor or "UF" means one of several numeric factors used in
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Related to Uncertainty factor

  • Sustainability Factors means environmental, social and employee matters, respect for human rights, anti‐corruption and anti‐bribery matters.

  • Quality factor (Q) means the modifying factor, listed in Tables I and II of 38.4(4), that is used to derive dose equivalent from absorbed dose.

  • Weighting factor wT for an organ or tissue (T) means the proportion of the risk of stochastic effects resulting from irradiation of that organ or tissue to the total risk of stochastic effects when the whole body is irradiated uniformly. For calculating the effective dose equivalent, the values of wT are:

  • Capacity factor means the ratio of the average load on a machine or equipment for the period of time considered to the capacity rating of the machine or equipment.

  • Loss Factor means the scaling factor determined in accordance with clause 7 and applied by the reconciliation manager to volumes of electricity measured or estimated in respect of ICPs on the Network, in order to reflect the impact of the ICP on Losses within the Network;

  • Reserve Penalty Factor means the cost, in $/MWh, associated with being unable to meet a specific reserve requirement in a Reserve Zone or Reserve Sub-zone. A Reserve Penalty Factor will be defined for each reserve requirement in a Reserve Zone or Reserve Sub-zone.

  • Adjustment Factor means, with respect to a share of the Fund (or one unit of any other security for which a Fund Closing Price must be determined), 1.0, subject to adjustment in the event of certain events affecting the shares of the Fund. See “—Anti-dilution Adjustments Relating to the Fund; Alternate Calculation —Anti-dilution Adjustments” below.

  • Leverage Factor means the leverage factor in respect of a Series of ETP Securities as specified in the relevant Final Terms.

  • Severity Level means the actual impact of a Defect on a user’s operational environment as further described in the table below.

  • Interest Factor means monthly compounding, discounting or annuitizing, as applicable, at a rate set forth in Exhibit A.

  • Fit factor means a quantitative estimate of the fit of a particular respirator to a specific individual, and typically estimates the ratio of the concentration of a substance in ambient air to its concentration inside the respirator when worn.

  • Performance Factor means any matter that could or will significantly affect a party’s ability to fulfill its obligations under this Agreement;

  • Power Factor means the ratio of usage power measured in kW to total power measured in kVA;

  • Index Level means, in respect of any day and subject to Adjustment Provisions: (a) in respect of an Index(other than a Multiple Exchange Index), the closing level of such Indexat the Valuation Time on such day; and (b) in respect of an Index that is a Multiple Exchange Index, the official closing level of the Index on such day at the Valuation Time as calculated and published by the Index Sponsor each as rounded up to four decimal places (with 0.00005 being rounded up), allas determined by the Calculation Agent.

  • Performance Factors means any of the factors selected by the Committee and specified in an Award Agreement, from among the following objective measures, either individually, alternatively or in any combination, applied to the Company as a whole or any business unit or Subsidiary, either individually, alternatively, or in any combination, on a GAAP or non-GAAP basis, and measured, to the extent applicable on an absolute basis or relative to a pre-established target, to determine whether the performance goals established by the Committee with respect to applicable Awards have been satisfied: