How can I use proc nlmixed for two-level joint model for data that is not longitudinal?
Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?
06 August 2024 980 5 View
Hello everyone! I am currently exploring the performance of large models in understanding knowledge in specific domains, and attempting to construct a knowledge framework similar to what...
05 August 2024 5,729 2 View
Regarding a model for simulating battery charge and discharge, what do you consider to be high fidelity? What is the acceptable percentage of error (regardless of the metric)? Could you suggest...
03 August 2024 5,358 0 View
need to open an account to upload my published papers
01 August 2024 9,255 1 View
All plants are green but some of these plants becomes yellow. I did not found any reason. Please help me to find out the real problem.
01 August 2024 589 4 View
I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...
01 August 2024 9,227 1 View
Hello. Thanks for your consideration to see my question. Recently, I conducted XPS anaylsis of g-CN that is prepared from thermal polycondensation of DCDA, so-called conventional bulk-g-CN,...
30 July 2024 9,824 2 View
N=6 Comparing pre and post test likert scale responses. Participants are mix of practicing & preservice teachers.
30 July 2024 7,233 4 View
Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...
30 July 2024 906 2 View
Can an analytical method's limit of quantification (LOQ) be outside its linear dynamic range, or is it always required to be within it? Please provide a thorough explanation supported by verified...
29 July 2024 7,198 9 View
We have observed that tube to tube sheet joint leaked in our boiler and needs to overcome same by knowing the root cause.
08 August 2024 3,161 0 View
I ask Chinese seismologists to inform me: who should I contact to create a joint Forecast Center? I do not hide that the beginning of my work was connected with the successful forecast of the...
22 July 2024 2,276 1 View
How does stream gradient steepness change moving downstream and gradient of a stream change along its longitudinal profile?
12 July 2024 4,113 0 View
I have a longitudinal dataset where I am looking to examine whether individuals change their category membership of a variable (with four categories) over four time points (baseline, 1y, 2y, 3y)....
16 June 2024 9,770 10 View
I conducted a tensile test to analyze the strength of a welded joint and to implement an FEM model. Due to the high hardness of the base material, slippage between the grip and the base material...
10 June 2024 5,736 6 View
software 3DEC in geotechnical engineering
05 May 2024 6,654 1 View
We developed a mathematical model from mathematical point of view and we need tumor growth data that reflect number of tumor cells respect to time for our validation. We are not expert in this...
02 May 2024 491 3 View
Short answer
22 April 2024 665 0 View
I'm currently doing my thesis which uses structural equation modeling for longitudinal data. Is it normal for a model to have 0 RMSEA, Test Statistic, Degrees of Freedom, and p-value? What does...
12 April 2024 2,358 3 View
We know that there are 206 bones in human body but we do not know how many joints are there in our body. In Islamic books, Prophet Mohammad(S) said, there are 360 joints are there in human body....
11 April 2024 2,346 1 View