Is there a website that provides the near real-time solar and geomagnetic indices?

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Formulate model for one integer optimization?

I am working on one optimization problem. the model with two states, the transition between the two states based on one threshold value (L = 5, which L< 5 -> Normal state, L== 5 ->...

11 February 2021 4,045 3 View

How VASP perform selfconsistent noncollinear calculations?

Selfconsistent noncollinear magnetic calculations can be done in VASP. I am wondering how VASP update the spin directions at each local site. For molecular dynamics, VASP search the next...

16 January 2021 1,398 3 View

The impact of different poisson's ratios when analysising field vibration?

The Poisson's ratio of soil is quite difficult for us geo-engineers to obtain. I came across a problem when I tried to determine the parameters in a FEM model. For the saturated clay in...

02 January 2021 8,971 3 View

How to make sure self-ligation of a linear plasmid?

I want to ligate a linear 1.7kbp plasmid with the EcoRI sites at two sides, but when I use the quick ligase kit from NEB to test the ligation efficiency it is hard to ligate it. Is there anyone...

08 December 2020 3,442 3 View

What does a higher LoD indicate in context of COVID19?

I have seen COVID19 test LoD ranging from 180 to 600000 NAAT Detectable Units/mL So a rapid antigen test with LoD of TCID50 1.13 x10^2 per mL and RT PCR TCID50 1x10^-2 per mL (600 NDU/mL) and a...

28 November 2020 1,238 3 View

Protein concentration decrease after dialysis?

Recently I have been involved in this problem: After expressed by adding IPTG, lysed with B-PER, and resolved with Buffer B (8M urea), incubate with Ni-NTA beads, everything looks fine. When I...

21 November 2020 7,416 3 View

How to use CEL technology in ABaqus to simulate TNT explosion in air?

Hello everybody! Recently, I have been using CEL technology to simulate the TNT explosion in the air, but I have encountered some difficulties. I don't know how to do discrete field material...

13 September 2020 7,012 2 View

How to fix the part overlap problem in Abaqus Explicit?

Hi, I was doing the Abaqus explicit model for a plain woven fabric where two types of yarns(PU&PA) were set as the weft and one type of yarn(PA) was set as the warp. When the load applied to the...

10 September 2020 1,164 2 View

How to gain the access to image recognition?

I am graduate from other major, and now working in computer science and technology, my roomates are mostly researching on image recognition. I want to switch to it and learn how to cooperate with...

21 August 2020 2,888 9 View

How to tranfect PMA-treated THP-1 cells?

I differentiated THP-1 cells to macrophages using PMA(100ng/ml) and then used lentivirus to deliver shRNA to knockdown my target genes. Unfortunately, it was too difficult to be transfected...

16 August 2020 5,073 3 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Anyone found any research papers on solar furnace design calculations (for solar concentration)?

I am thinking about working on solar furnace with heliostats that concentrate sunlight and heat molten salt, but currently no luck with research. Not a lot of papers based on the subject. (check...

01 March 2021 5,023 5 View

Where can I find atmospheric measurement profiles (temperature, density, etc.) between 300-800 km altitude?

I am investigating thermospheric mass density profiles between 300-800 km altitude. I would like to compare the variability with other parameters, including temperature, electron content,...

01 March 2021 5,902 3 View

How to size battery banks?

I am designing a small grid connected solar PV power-plant. As the battery's capacity is specified in Ah and demand in kWh. What is the best way to size the battery bank? I have battery price in...

28 February 2021 1,638 3 View

How to design a boost converter for a mppt controller?

I have a doubt on how to select the inductor and capacitor value when I want to implement MPPT controller. This is because we always take a maximum output voltage and current but in this case, we...

28 February 2021 3,637 2 View

How to sample data to increase presence of solar panels in the images?

I am working on creating deep neural network on geospatial dataset and wanted to know how to do the sampling so that I can increase the presence of solar panels in the images. I cannot use entire...

25 February 2021 3,936 6 View

Suppose we have a banana seller cart consisting of 4 wheels, weighing about 300 kg. How much torque motors are needed to pull of push it electrically?

I am thinking of electrifying the street food carts while harvesting energy using solar panels on top.

22 February 2021 4,323 3 View

Gallium Antimonide (GaSb). Can anyone help me to find vendor (provider) to sell GaSb solar cell ?

I am searching of provider (GaSb), I only found this one (https://jxcrystals.com/wp/about/). Can anyone help me?

21 February 2021 1,945 2 View