What are the things you should keep in mind while designing a controller for a quadrotor and want to implement it on hardware (via arducopter) ?

I am designing a flight controller for a quadrotor. At first I am designing a nested/cascaded controller consisting of only proportional controllers Kp . Now, if i tune the rate controller for 10...

03 February 2021 5,001 3 View

How to discretize a continuous time state-space model in MATLAB correctly?

I am trying to discretize a continuous time state space model using the following code s=tf('s'); G=1/(Iyy*(s^2)) Gs=ss(G) Gd=c2d(Gs,0.01,'zoh'); Now, when i use this discretized model 'Discrete...

30 January 2021 8,665 10 View

How can we measure the surface relative content of deconvoluted Mn 2p3/2 XPS spectra?

Somewhere in papers, it is written as Mn 2p3/2 XPS spectra can be deconvoluted into four peaks at 640.83, 641.92, 642.97 and 644.56 eV assigned to Mn(II), Mn(III), Mn(IV), and the shakeup peak,...

24 December 2020 4,323 4 View

How is the DC Bias voltage applied to single ended inverting Amplifiers?

I have seen some circuits in which people apply the signal on negative terminal and ground the positive terminal of amplifier, say a 2 stage amplifier? How do they provide the bias voltage? Is the...

12 November 2020 1,660 1 View

How does soil pH respond to the co-exposure of earthworms and nano-material(NMs) over different time periods?

I incubate the soil with earthworm and applied different concentrations of NMs. My pH data looks strange to me. Previously, literature documented that earthworms improve soil pH. Does anyone...

03 June 2020 1,908 10 View

Does a short circuit between mosfet differential pair act as a AC ground for small signal Analysis?

I'm working on Bipolar shaper amplifier and solving some circuits. As shown in attachment the drain of two Mosfet pairs are shorted. Does that serve as AC ground in small signal analysis? I've...

30 March 2020 4,696 4 View

List of Universities who are offering Phd (Management/Business Administration) in Iraq?

Specific name of university

29 September 2019 5,972 3 View

I am working with a protein and trying to resolve it on Blue-Native PAGE. Can somebody suggest be a recipe for it?

I have been trying to perform Blue-Native PAGE using procedure from doi:10.1038/nprot.2006.62. However, the stacking gel does not solidifies even after two hours, at room temperature. Can...

04 April 2019 4,777 2 View

I am planning for Native PAGE for a protein with pI 8.5 - 8.7. What should be the minimum difference of pH of buffer to avoid electrode switching?

The Gel has pH 8.9. and the pH of loading dye is 6.67. What should be the pH of running buffer to allow smooth running of my protein into the gel. I prepared buffer of pH 8.49 but I was unable to...

25 March 2019 9,877 6 View

Any suggestion what's going on?

I submitted a manuscript on a novel and interesting finding on July 30, 2018 to a reputed journal. Following editorial review it went to peer-review. It is over 8 months, no decision yet. What...

24 March 2019 9,737 2 View

Is there a method of determining feed digestibility without the need to re-pellet the feed?

I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker....

28 February 2021 7,967 3 View

Is is possible to pole with corona poling pellets of the sample material instead of thin films?

As it is highly probable that pellets will have a higher degree of air gaps and voids than thin films, is it possible to pole the samples with corona poling nevertheless? Or is there the...

24 February 2021 1,349 1 View

What to do with absence of fluorescence label in Fucci2a mouse-derived fibroblast culture?

Dear all, I have harvested fibroblast cells from R26p-Fucci2 mouse embryos (mouse line as described in this paper: https://dev.biologists.org/content/140/1/237) and cultured them on plastic,...

17 February 2021 3,368 2 View

Why are my western blot bands so distorted?

Hi guys I'm out of ideas here please help! I've never had consistent problem like this doing westerns before and I can't figure it out. The condition used: - First 4 lanes have 50ug protein in...

04 February 2021 2,297 3 View

Can we coat the pellet with graphite spray in place of silver paste for making electrical contact to measure the thermoelectric properties?

I want to coat the pellet because without electrical contact (may be due to the high resistance of the pellet), the V-I plot is not coming in the ZEM-3 instrument. I want to measure electrical...

24 January 2021 836 2 View

How the microplastics levels in freshwater and marine water ecosystem be controlled?

Microplastics have been found in land, air, freshwater, effluent from a wastewater treatment plant and even in tap water and bottled water. The small plastic particles (less than 5 mm) pose a...

19 January 2021 8,637 3 View

Control in microstructure with growth inhibitor?

Dear researchers, I wish to understand the role of grain growth inhibitor in controlling the microstructure of the ceramic pellet. How it controls the growth? Also, I wish to know the grain...

15 January 2021 3,859 3 View

How to make sure that ultrasonic lysis of E.coli is done completely?

What's the criteria of comolete lysis of E.coli when breaking them using ultrasonic? What phenomena can help to determine if the cell are broken completely? From smell, transparence of the lysis...

07 January 2021 1,911 3 View

No title

31 December 2020 9,207 4 View

How do I know if my E.coli cells are fully lysed from sonication ?

Hi everyone, I am doing protein expression via E.coli. I am required to lyse the e.coli cells via sonication to obtain cell lysate. I normally sonicate 1L cell pellet suspended in salt buffer at...

22 December 2020 9,675 7 View