Handled typos on equations syntax
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@ -45,7 +45,7 @@ Under the :mod:`cara.apps.calculator.model_generator`, when it comes to generate
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To summarize, the Expiration contains the distribution of the diameters as a vectorised float. Depending on different expiratory types, the contributions from each mode will be different, therefore the result in the distribution also differs from model to model.
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Emission Rate - :math:`\mathrm{vR}(D)`
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=====================
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======================================
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The mathematical equations to calculate :math:`\mathrm{vR}(D)` are defined in the paper
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(Henriques A et al, Modelling airborne transmission of SARS-CoV-2 using CARA: risk assessment for enclosed spaces.
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@ -61,15 +61,14 @@ since :math:`\mathrm{vR}(D)` is a diameter-dependent quantity. :math:`E_{c, j}`
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In the code, for a given Expiration, we use different methods to perform the calculations *set-by-step*:
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1. Calculate the non aerosol-dependent quantities in the emission rate, which is the multiplication of the diameter-**independent** variables: :meth:`cara.models.InfectedPopulation.emission_rate_per_aerosol_when_present`. This corresponds to the :math:`\mathrm{vl_{in}} \cdot \mathrm{BR_{k}}` part of the :math:`\mathrm{vR}(D)` equation.
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2. Calculate the diameter-**dependent** variable :meth:`cara.models.InfectedPopulation.aerosols`, which is the result of :math:`E_{c,j}(D) = N_p(D) \cdot V_p(D) \cdot (1 − η_\mathrm{out}(D))` (in mL/(m\ :sup:`3` \.µm)).
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Note that this result is not integrated over the diameters at this stage, thus the units are still *'per aerosol diameter'*.
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1. Calculate the full emission rate, which is the multiplication of the two previous methods, and corresponds to :math:`\mathrm{vR(D)}`: :meth:`cara.models._PopulationWithVirus.emission_rate_when_present`
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2. Calculate the diameter-**dependent** variable :meth:`cara.models.InfectedPopulation.aerosols`, which is the result of :math:`E_{c,j}(D) = N_p(D) \cdot V_p(D) \cdot (1 − η_\mathrm{out}(D))` (in mL/(m\ :sup:`3` \.µm)). Note that this result is not integrated over the diameters at this stage, thus the units are still *'per aerosol diameter'*.
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3. Calculate the full emission rate, which is the multiplication of the two previous methods, and corresponds to :math:`\mathrm{vR(D)}`: :meth:`cara.models._PopulationWithVirus.emission_rate_when_present`.
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Note that the diameter-dependence is kept at this stage. Since other parameters downstream in code are also diameter-dependent, the Monte-Carlo integration over the aerosol sizes is computed at the level of the dose :math:`\mathrm{vD^{total}}`.
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In case one would like to have intermediate results for emission rate, perform the Monte-Carlo integration of :math:`E_{c, j}^{\mathrm{total}}` and compute :math:`\mathrm{vR^{total}} =\mathrm{vl_{in}} \cdot E_{c, j}^{\mathrm{total}} \cdot \mathrm{BR_k}`
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Concentration - C(t, D)
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=======================
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Concentration - :math:`C(t, D)`
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===============================
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Long-range approach
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*******************
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@ -78,8 +77,8 @@ Starting with the long-range concentration of virus-laden aerosols of a given si
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:math:`C(t, D)=\frac{\mathrm{vR}(D) \cdot N_{\mathrm{inf}}}{\lambda_{\mathrm{vRR}}(D) \cdot V_r}-\left (\frac{\mathrm{vR}(D) \cdot N_{\mathrm{inf}}}{\lambda_{\mathrm{vRR}}(D) \cdot V_r}-C_0(D) \right )e^{-\lambda_{\mathrm{vRR}}(D)t}` ,
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where **emission rate vR(D)** and **viral removal rate** :math:`\lambda_{\mathrm{vRR}}` (:meth: `infectious_virus_removal_rate`) are diameter-dependent.
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Since the emission rate is, in turn, dependent on other diameter-independent variables (:math:`\mathrm{vl}_\mathrm{in}` and :math:`\mathrm{BR}_k``) that should not be included when calculating the integral, the concentration method was written to be normalized by the emission rate.
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where **emission rate** - :math:`\mathrm{vR(D)}` - and **viral removal rate** - :math:`\lambda_{\mathrm{vRR}}` (:meth:`infectious_virus_removal_rate`) are diameter-dependent.
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Since the emission rate is, in turn, dependent on other diameter-independent variables (:math:`\mathrm{vl_{in}}` and :math:`\mathrm{BR}_k`) that should not be included when calculating the integral, the concentration method was written to be normalized by the emission rate.
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In other words, we can split the concentration in two different formulations:
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@ -101,7 +100,7 @@ The following methods calculate the integrated concentration between any two tim
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.. Note that the integral over the diameters is performed later in the dose, with the average of the samples, since the diameters are sampled according to the distribution given by **Np(D)**. The integral over different times is calculated directly in the class (integrated methods).
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Dose - :math:`\mathrm{vD}`
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*********
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**************************
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The term “dose” refers to the number of viable virions that will contribute to a potential infection.
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@ -158,7 +157,7 @@ In the code, :meth:`cara.models.Expiration.jet_origin_concentration` computes th
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When calculating the dose, we get the concentration normalized by the **viral load** and **breathing rate**, and without the **dilution factor**, since these parameters are Monte-Carlo variables that do not depend on the diameter.
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Concentration - :math:`C(t, D)`
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***********************
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*******************************
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The short-range concentration close to the mouth or nose of an exposed person, may be written as:
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@ -182,7 +181,7 @@ The method :meth:`cara.models.ShortRangeModel.short_range_concentration` applies
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The final concentration is the sum of the `short-range` and `long-range` concentrations.
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Dose - :math:`vD`
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*********
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*****************
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In theory, the `short-range` dose is defined as follows:
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