How the summation of dBm units gives the value in dB units?

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Can anyone give more research details on this record plummet on solar cell cost, with new 44.7% efficiency?

http://cleantechnica.com/2013/09/24/new-solar-cell-efficiency-record-of-44-7-set/

04 May 2014 2,010 1 View

If you rotate a disc with concentric black and white circles in bright sunlight and then stare at it and then bring in dark, why can you see colors?

Such spiral black and white discs when rotated reflects colors; all seven colors and bright colors which are not there. This is a common optical illusion and is still not explained.

03 April 2014 5,745 4 View

How to find out the gradient value in canny edge operator in MATLAB ?

As in sobel operator there are two directions x and y and by taking derivative of it we can find its magnitude and by square root of it to find the gradient value.

11 December 2013 3,698 0 View

Which apodization profile is best: uniform apodization, Gaussian apodization or Tanh (hyperbolic tangent)?

For high data rate & low channel spacing, I used 4 channel High Dense WDM system which includes two FBG filter which are back to back connected. One filter has uniform apodization and the second...

31 December 2012 5,503 0 View

How to calculate a 233 mixed repeated measures ANOVA using Gpower? Are there other, more appropriate methods for calculating sample size?

Our experimental design was a 2 (social value orientation: pro-social, pro-self) * 3 (grade: 4th, 5th, 6th) * 3 (peer comparison: fair distribution, mildly unfair, extremely unfair) repeated...

03 June 2024 8,898 0 View

Computing the predicted probabilities for each independent variable with two or three values, including the reference category?

I have fit a Multinomial Logistic Regression (NOMREG) model in SPSS, and have a table of parameter estimates. How are these parameter estimates used to compute the predicted probabilities for each...

11 May 2024 905 6 View

I'm getting error:( Domain error. To compute complex results from real x, use 'sqrt(complex(x)) ) in simulink?

hi there . i'm currently working on a thesis which involves designing a fast nonsingular terminal sliding-mode controller for attitude control of a quadrotor. the outputs of sliding mode...

20 April 2024 425 2 View

Does sodium level of blood in rheumatoid arthritis patient using methotrexate as DEMARDS falls from the normal value?

It is recently reported as a case study in a medical journal that Sodium level in blood falls down to 119 mEq/L leading to hyponatrenia. Will anybody suggest if it is so what precautions can be...

04 March 2024 2,059 1 View

What is the normal range of Estrogen in female rats blood?

13 February 2024 2,901 0 View

I synthesized silver nanoparticles using the green synthesis method, but its absorption peak showed 350, hile it should be around 430 nm?

Hello every body, Can you please help me I synthesized silver nanoparticles using the green synthesis method, but its absorption peak showed 350, while it should be around 430 nm. I also observed...

26 January 2024 3,481 2 View

Regarding Normalization value?

before normalization i get 5 crips value of criteria that be c1= -0.892 c2=0.005 c3=0.067 c4=-0.076 c5=0.070 How i do normalization ? can i use the same formula that i use while getting all...

01 January 2024 7,558 0 View

Inquiry Regarding Accepted Heat Threshold for Arid Climes in Iran?

As part of my current investigation, I am keen to understand the numerical value of the accepted heat threshold for arid climes. Could you kindly share your expertise on how to attain the...

10 November 2023 9,813 2 View

Why beta actin used as a house keeping gene for RT-PCR and western blot ?

what is the normal range in case of cell lines?

28 October 2023 3,309 3 View

Do High or low A260/A230 and 260/280 ratio for isolated RNA make problems in real time PCR results?

I extracted RNA from the animal tissues by Trizol and phenol technique. The A260/A230 and 260/280 ratio were sometime lower or higher than a normal range. Do this make problems for my real-time...

21 October 2023 1,042 3 View