How to estimate the standard deviation of the carbom emission of a company producing many different products?

I am aware of the portfolio theory in general but want to know of a journal or author especialized in this issue.

14 January 2021 7,566 2 View

How is vertical agriculture progressing in Colombia?

Vertical agriculture offers an innovative solution to reduce the pressure of cultivation on soils. The intensive use of machinery and large areas of land harm biodiversity.

28 October 2020 8,773 3 View

Is there a way to make Facio (GUI for FMO) work on Mac OS Catalina?

I am trying to use the FMO (Fragment Molecular Orbital) method which works to make large (thousands of atoms) molecules more palatable for ab initio computational quantum-chemical calculations on...

29 September 2020 4,896 2 View

Recommend antibodies that works in paraffin sections for synaptic and astrocytes markers in rat samples?

Hello, I am trying to find antibodies that can be used in paraffin rat brain sections against S100B , PSD95, Synapsin-I, VGLUT1,VGLUT2. I am checking the technical info provided by some companies...

12 August 2020 5,382 2 View

Innovation, Ideas permeability. Which factors make an idea to be commercialized?

There are a lot of new ideas in different fields, but only few will be innovative (new+comercialiced). As an example, Escalators and moving walks have the same mechanical design from more than...

13 July 2020 7,807 12 View

What is the minimum viral load that can be detected by TEM or SEM?

Imagine SARS-COV-2 in a surface to be recovered with an hyssop .

08 July 2020 1,193 3 View

Any good manual for phenomenological approach to sustainability?

I'm thinking about a turn from my ethnographic approach to a phenomenological approach in the study of sustainability and forest preservation. However, I didn't find any good manual to design and...

06 July 2020 9,618 1 View

Are there someone thinking about a simulation software for evacuation/circulation tasks including COVID-19 propagation?

I think it would be interesting to implement the propagation of the COVID-19 virus in some simulation software for the circulation of people, for a population diverse in ages, heights, etc.,...

30 June 2020 7,481 14 View

COVID-19, Lessons learned ?

It should be mandatory to learn from what life teaches us. With COVID-19, we have been forced to buy sanitary materials because in our country there was no industry to do so (dependency) and we...

30 June 2020 3,018 36 View

How to extract polygons of species distribution from books?

If you need a distribution map from a book, how do people deal with that? Do u email authors to obtain the layers or is there a way to export the polygons from the book images? Colleagues and I...

20 June 2020 4,391 1 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View