Is there any comparative study on devices that measure heart rate variability biofeedback?

More Fernando A. Marengo Rodriguez's questions See All

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View

How to compute the distance in km between two points inside the Earth?

Hello everyone. I am looking for a simple formula to compute the distance in Km between two points inside the Earth. I do not mean the usual problem between to cities (distance along the surface)...

02 February 2021 3,455 4 View

Requesting protocols (96 well plate) for superoxide radical scavenging activity and hydroxyl radical scavenging activity?

Hello everyone, I am currently working on the natural colour pigment, betalains. I am looking for 96- well plate adopted assay protocols for measuring superoxide and hydroxyl radical scavenging...

03 January 2021 2,414 2 View

Any good reference that links economic/industrial policy to changed agent behavior?

Usually industrial policy is interpreted as changing economic structure from in favor of more productive/advanced economic activities. But would like to read something that discusses the...

31 December 2020 3,199 3 View

How do you transmit and evaluate ethics and moral values in you teaching activity?

Ethics and moral values have always being an essential part of teaching and scientific research. How do you teach and evaluate these essential subjects in your daily interaction with students?

23 December 2020 5,058 7 View

How to simulate the magnetohydrodynamics (MHD) phenomena in COMSOL? What is the best way to learn how to use COMSOL?

I would like to simulate the Lorentz Force resulting from the magnetohydrodynamics (MHD) phenomenon in an ionic solution.

19 December 2020 8,278 9 View

RNA-Seq for the analysis of ribosomal RNA (rRNA) processing sites?

Greetings! I want to study ribosomal RNA expression and potential processing sites in bacteria. To such effect, I want to perform an RNA-Seq experiment in order to analyze potential rRNA...

02 December 2020 1,310 2 View

Having issues understanding the particles/mL to molarity conversion, I've seen many different way but non of them seem to match one an the other?

I have 68nm spherical Au NPs, which gave me a concentration of 1.22 x 10^9 particles/mL. How can I calculate the molarity without the need for TEM?

22 November 2020 8,850 3 View

Problem executing MrBayes. Help?

Hi, I'm trying to run MrBayes 3.2.7 with a matrix of 37 species and 20561 nucleotides. I consistently receive the following error: MrBayes > Execute...

18 November 2020 3,867 3 View

How to migrate a graph database to SQL?

In the research that I am working on, I need to migrate a graph database to sql to carry out tests, I am using neo4j as a tool, the information I have found is about migrating from SQL to neo4j...

09 November 2020 1,869 3 View

Does anyone know an alternative product for cardiac Troponin T antibody for Immunofluorescence (Thermo # MA512960)?

We have been using Thermo Fisher anti-cardiac Troponin T antibody for immunofluorescence staining in FFPE mouse heart sections but it was recently discontinued. The literature shows it to be the...

01 March 2021 4,937 1 View

How to perform Cox proportional hazard analysis or Kaplan-meier survival analysis in SPSS?

At first please see the attachment. This experiment was performed for a period of 7 days (n=100). After 7 days, we found different level of survival rate (%) for each treatment. Now, I want to...

15 February 2021 9,145 2 View

How to consider effects of rapid warm adaptation in modeling of ecological impacts of warming?

I would highly appreciate it if my fellow ecologists (biologists) provide their opinion on the thoughts below [esp., shortly tell us which path may be more effective, if they know another way, if...

15 February 2021 3,642 6 View

How do you interpret theoretical vs. experimental reaction orders with respect to a reactant?

I recently came across a paper focusing on the hydrodeoxygenation of oxygen-containing compounds. The paper linearized the rate equation in order to determine the experimental reaction order with...

14 February 2021 8,254 2 View

How to calculate the sample size in an interobserver variability study?

Hi I am conducting an interobserver variability study where we have 12 raters who are going to rate samples of lesions. They will rate up to 10 variables per sample. Although the size of the...

12 February 2021 7,276 3 View

Hello .Ineed a researchs about systolic heart failure any one can help me ?

Am a master student .I need an information about this case to write my thesis?

09 February 2021 9,706 2 View

Does euthanasia by CO2 inhalation cause NF-kB activation in mouse heart or body in general?

I was wondering if euthanizing mice by carbon dioxide inhalation would cause activation of NF-kB inflammatory response?

26 January 2021 4,096 2 View

Is there any method I can use to isolate single cells (i.e cardiomyocytes and non-cardiomyocytes) from snap from rat heart tissue?

I have GD18.5 heart tissue currently snap frozen in -80, apart from mRNA and protein analysis on whole tissue, is there a way of isolating single cell populations to study localization of a...

19 January 2021 4,044 3 View

Have an interesting article relating to climate impact on the energy system?

I will be guest editing a Special Issue "Climate Variability Impacts on the Energy System". The Special Issue covers issues relating to climate variability and change (CV&C) impact on the...

01 January 2021 3,059 1 View

How to specify flow rate boundary condition to these bars in COMSOL?

Hi, I am working on topology optimization. Now, I want to minimize the pressure drop in the pink domain (Fig1). I also need to control the flow by using flow equality (Fig2). I have tried to cut...

01 January 2021 2,833 3 View

Stephen David Edwards

Article Empirical and Heuristic Phenomenological Case Study of the H...

This article compared two apps from HeartMath, ie. Inner Balance and Global Coherence.

Fernando A. Marengo Rodriguez

I love the human values that inspire you to write that beautiful paper, Dr. Edwards. I've also been practising South American ancient wisdom for some time, with very good results for my and for over 500+clients in 22 countries. Do you think we can make a short test of the devices you have in combination with the ancient tools I use? Thanks! Stephen David Edwards

Scott Corron

biofeedback data has been studied in the last few years utilizing mindfulness training and Fitbit device. The Fitbit does predict and gather some information on HRV. I don’t think it published yet. Sudden cardiac arrest survivors were in a pilot study at NYU whereby during guided and unguided mindfulness training, data was collected with fitbit from which HRV could be observed. It would indeed be interesting to compare against other device data gathering as there are many emerging on market. Whoop another similar device to fitbit. I’m interested in this type of work and was a pilot patient participant in the NYU study. The biofeedback indeed lowered and improved HR for me among other benefits that were clearly visible in the data gathered by the Fitbit.