Recent content by uzi kiko

Thanks, @pasmith. Our system is based on c++. I used here Python code just to illustrate the problem. BTW: I am not sure that I agree with @pbuk regarding his point about the polar errors. Although there is a difference in resolution close to the center relative to the resolution at the end of...

Thanks a lot! Exactly what I was looking for. I enclose here the code I changed according to your answer so that now the calculation of the area using a polar integral is correct up to the fifth digit after the dot, and about half the steps for the same calculation in Cartesian coordinates...

In my job, I was given the task of calculating a force that operates an ultrasound transmitter on a receiver. The calculation is made by assuming that each point on the transmitter is a small transmitter and integration should be made on the surface of the transmitter. Since the transmitter is...

Thanks a lot! you're absolutely right. In my experiment, I ignored the need for the current to eventually move through the water ...

Hello Inspired by this video, I wondered if it was possible to create a process of electrolysis in saltwater using a single electrode. To my understanding (Please see the attached diagram), if a direct current passes through I2 (after the diode) a direct current must also pass through I1...

Hi When I read the following article: http://nopr.niscair.res.in/bitstream/123456789/14183/1/IJPAP%2050%286%29%20405-410.pdf I tried to convert the value of the conductivity for saline in 500 MHz. At the article, they present the conductivity as ε'' = 70. Which ε'' is the imaginary part of...

Thank you very much for the super fast and great answers! They are very helpful. Let's say that I used MLE and came out with the most likelihood model. For example, let say that for injection of 1ml the values will distribute as X~N(0,1) and for 2ml X~N(1,1). Now, after I calculated the MLE...

Hello everyone In my study, I inject a different amount of fluid in each experiment, such as 1 ml, 2 ml..., and test the change in the general dielectric properties of the solution. Now that I have done much (over 100) measurements for each injection in a specific volume, one can see that for...

Thank you very much!

Thank you Dale, I agree that if I want to understand the relation between the impedance and blood/brain ratio I should use regression test. But the most important parameter that I have to identify is the minimum blood/brain ratio that my device can measure. I would like to explain the way I...

Thanks a lot for your quick responses. Regarding tnich question: I am now at the next stage of my research. (You can find my paper here: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0186381) The first stage we indeed made a mathematical model. Now I am at the stage of...

Hi All I made an experiment where I measured the change of the impedance of a coil when I changed a environment parameter X times. For each change I collected ~20 samples. So I have a table with X lines that represent the number the change of the parameter and 20 columns that represent the...

The answer in case somebody else will interest: Need to understand that only the fraction of the drug that is uncharged can diffuse across membranes. So in case PH=4 and pKa=7 the solution will be acidic so the weak acid remain almost in the same concentration (50mM) so the solution is...

Hi all I got an exercise: Cells were floated in a mass in a solution with 150mM of NaCl (isotonic conditions). A weak acid was added to the solution with a pK of 7.0 and concentration of 50mM in the solution. What is the tonicity and osmoticity of the new solution if PH=4 I know that I should...

Thanks a lot for your answers. The purpose of the question was mainly for my education...