Anybody have resources (article) for predicting via logistic regression modelling for an environmental contaminant above a threshold concentration?

More Ellen R McGrory's questions See All

What are the inclusion and exclusion criteria for selecting studies in the meta-analysis?

According to the study of Pan et al. (2023) entitled "Diagnostic Efficacy of Serological Antibody Detection Tests for Hepatitis Delta Virus: A Systematic Review and Meta-Analysis," what are the...

08 April 2024 3,776 1 View

Whats is the best protocol for spheroid dissociation?

I'm doing primary tumor spheroids to a drug screening. We're having success to make the spheroids but I'm not having succes to dissociate the spheroids to evaluate the cell viability (using trypan...

18 July 2023 2,015 1 View

How to format qPCR data for geNorm?

Hi there, Has anyone successfully used GeNorm, one of the free programs to determine best reference gene(s) for qPCR? I cannot figure out how to format my qPCR data to get the qbase+ program to...

28 February 2023 7,677 2 View

Why won't EDC dissolve in Poly(acrylic acid)?

I'm trying to thiolate Poly(Acrylic acid) (PAA) with L-cysteine using EDC (or EDAC), however prior to the addition of L-cys, when I add EDC to PAA large clumps form in solution. 1g of PAA was...

01 February 2023 6,701 2 View

Refractive Index for Dako fluorescent mounting media?

Agilent Cat S302380-2, Dako Fluorescent Mounting Media I've checked the Agilent site and found no details regarding the product (and their chat bot is down), and specifically, the refractive...

26 January 2023 7,422 0 View

Methods to measure vascular leak?

I am trying to decide between different methods to compare vascular leak in the retina between different rodent groups. I have found a number of different methods, inlcuding immunofluoresence for...

25 October 2022 9,457 0 View

Target amplitude cannot be reached?

I work with a JPK Nanowizard 4, and though the calibration spectrum looks fine, and the corresponding resonance frequency reasonable, when I run AC Feedback Mode Wizard to select the resonance...

30 August 2022 941 0 View

How to analyse a shannon diversity index of two conditions and 2 years?

i am trying to analyse the diversity of sites in two conditions (protected area v non protected) and from 2021 to 2022. i have worked out the shannon diversity of each site but unsure on how to...

19 July 2022 3,284 0 View

What test can i do with shannon diversity indices of two unequal samples?

i have two condition and looking at comparing their diversity. however, i have 13 sites in one condition and 9 in the other. i calculated the shannon diversity index for both conditions, but as...

17 July 2022 4,585 0 View

What to do with heteroscedasticity for a linear regression analysis?

I seem to have a hard time with the statistics for linear regression. I have been scrolling on the Internet, but did not find an answer. I am testing the assumptions for linear regression, of...

10 March 2022 1,324 8 View

Feedback defines the constitution of an organism?

“Here is a thought experiment. Let's place Rodolpho Llinas's jarred-brain on top of a body (Fig. 1). I bet Llinas would argue that his jarred-brain retains its own consciousness, and the android...

11 August 2024 2,483 1 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Is it possible to use the Fused Deposition Modeling (FDM) to additively manufacture interconnected porous structure generation of >100-200 micrometer?

Usually, additive manufacturing techniques like SEBM, SLS, and SLM are used for interconnected porous lattice structure generation with sizes of >100–200 micrometers. Can the Fused Deposition...

09 August 2024 7,892 0 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

Self-Organizing Superorganisms—as envisaged by Nenad Sestan (2018)?

The rate of glucose consumption by the neocortex is reduced by over 80% during anesthesia (Sibson et al. 1998), which disables the synapses (Richards 2002) that are inundated by glial tissue (Engl...

08 August 2024 3,118 0 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

Can you suggest reliable sources defining "3D mesh" and "3D city models"?

Dear fellow researchers, I am currently working on a paper where I need to provide a reliable reference that defines and distinguishes between 3D mesh models and 3D city models. Although I am...

06 August 2024 9,986 2 View

Is there an alternative to a multinomial regression which allows the DV to be non mutually exclusive?

I am trying to analyse data from a survey examining what variables affect teachers perceived barriers to incorporating technology into their classroom. I have 5 predictor variables however my DV...

06 August 2024 1,752 3 View

Robertas Damasevicius

http://onlinelibrary.wiley.com/doi/10.1002/etc.5620210929/full

Ade Kurniawan

I wonder, should this be considered as classification problem? Why don't use linear regression to predict the concentration? If the number predicted by the model is above the threshold, then we know that it is highly contaminated.

Jill Lundell

What does your data look like? What does the response represent and what are your predictors? I am a statistician who specializes in classification, but I also work in environmental remediation so with a little more information I can probably help you out.

Shakeel Ahmed

See papers on model based approach.