How to compare a group + 2 of its subgroups via statistics analysis?

I have a dataset containing [length of time in DAYS] and [name of drug]. The days go from 1 to 42, and there are about 25 drugs. The majority of the data is for 3 days or less. The dataset is...

02 October 2020 5,274 2 View

Is there a reference on the idea of a price premium for a reliable product is worth the price?

Hi all, I'm looking for a reference or two that may support the idea that a reliable product is likely to command a price premium in the market. This is accepted by the market because a...

02 October 2020 4,863 2 View

Why not merge economics and engineering?

The framework of economics today draws largely from post-War scholarship. And here, we remember the use of biomathematics by Paul Samuelson and contemporaries of the sixties and seventies. Now,...

20 April 2020 4,923 14 View

Sucking mass away does not please coronavirus?

Formentera island had been through early self-quarantine, port closed, for 14 days and there is still no Covid19 cases in the island. Formentera is a weird Earthian gravitationnal aberration (as...

26 March 2020 1,157 2 View

As a polyglot invalid 65%, I feel more armed to face myself in confinement. Do you agree at least dairy 15mn meditation emptying mind is necessary?

As a polyglot invalid 65%, I feel more armed to face myself in confinement. I know how I can help friends and neighbors. It's time to bury all war axes. The real time for a better world.

14 March 2020 1,663 6 View

Mathematics: Why ignore Ishango?

07 March 2020 4,472 7 View

Geometry released algebra. Must conics release cubics?

Hark back 11th century, we find algebra shackled by geometry. So, there was no honour in the negative number. When algebra was released, it opened a new world for us. Before then, geometry had...

06 March 2020 2,660 4 View

Can free glutamate ions turn dangerous?

can a non-human virus step on them, using those unbound particles, easier to conquest, to invade the host ? Glutamate only taste when unbound....

17 February 2020 5,423 10 View

Public policy: Where are the big three equations (heat, wave and Laplace)?

Distribution dominates policy. Resources are injected at a point and distribute across communities. Can the distribution be almost instantaneous as in the heat equation? Do the resources morph and...

30 January 2020 3,439 2 View

Why can't we get the energy from lightnings, during storms?

We know how to attract them, how to drive them to the ground, why can't we store them? Batteries are too weak to hold it on? A too big diode should be needed to transform it in electricity?

25 November 2018 1,929 4 View

What are the most relevant MSc proposal topics for Petroleum Production Engineering at the moment?

I am a Petroleum Production Engg MSc student at Robert Gordon University in Aberdeen and I am in the process of selecting a topic for my MSc Engineering Investigation proposal. I would very much...

01 March 2021 7,396 4 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

How to increase solubility of Poly acrylic acid in Dioxane solvent?

I am working with Polyacrylic acid (100.000Da) and instead of water, I need to use another solvent (dioxane) to dissolve PAA. However, because of the high molecular weight, it's quite hard to...

25 February 2021 2,225 5 View

How to calculate Z (the number of molecules in a unit cell) for calculating theoretical density?

I am trying to calculate the theoretical density of my ceramics materials. I use the formula below to calculate the theoretical density: Theoretical density = (Molecular weight x No. of molecules...

24 February 2021 3,823 2 View

How we can measure Kemp % in wool without using of benzene?

Would you please let me to know about the methods for measurement of medullation and Kemp % on animal? My problem is that the wool sampling and sending to laboratory is not possible. So I would...

21 February 2021 7,260 4 View

Are ZnS nanoparticles moisture sensitive?

Hello Everyone, I tried to form ZnS nanoparticles using the hot injection method and was able to form the same (confirmed by XRD). When I centrifuged, after the reaction I got a kind of white...

17 February 2021 1,709 3 View

Pile-Raft connection?

Greetings, I was wondering what is the optimal way to connect the reinforcement at the top of the pile (the part that connects to the raft foundation): -The pile bars are left straight and...

16 February 2021 2,007 3 View

Best protocol for immunogold using araldite resin ?

Hello, We perfom Tokuyasu method (ultrathin cryo sectionning) very often to make immunogold experiments. This time, we need to make a PLT technique with K4M or LR white resin. Our results were...

14 February 2021 4,959 1 View

Is secondary metabolite production more at vegetative growth stage or during reproductive stage?

Hi, I am working on the effect of heavy metals on a medicinal plant by pot experimentation. Analyzing the effect of heavy metals on secondary metabolites is one of the parameters. I will be...

11 February 2021 6,683 6 View